PlanetHam.org - Ham Radio Blogs

January 06, 2009

AC7FA

Load up little pistols. This contest is for you.

Mix together the NCCC Thursday sprint with a little World Radiosport Team Championship and a little sailing regatta handicapping and you get the Locust QSO Party. Rick, K6VVA a.k.a. The Locust, organized the first LQP to celebrate his 50th anniversary as a ham. 2009 will be the third running of the “LQP - 52st Anniversary of License Edition.” (sic)

The date and time: January 21, 2009 at 6:00 pm PST (not Z, PST) through 6:51:59 pm (PST). With categories that include provisions for geographic location (with much relief here in the ’suffering sevens’), NCCC membership, a NOOB category, and a green category (wind or solar power). (READ THE RULES.)

Rick freely admits that the rules are a bit complicated and suggests printing, reading them at least twice, and making notes in the margins to make sure you understand them. There are strict rules for how much power you may output according to the type of antenna you are using. I’m in the 100 watt class because of my lower than 40 feet ground mounted vertical. If you are running stacked 3 or 4 el 40M aluminum or wire yagis, you are limited to 15 watts. (READ THE RULES.) No SO2R, SO2V, Packet spots, or Skimmer. Exchange is your name and QTH (READ THE RULES). The handicapping system is almost pure genius.

This contest sounds like a brilliant good time. It’s on my calendar.

by Don (AC7FA) at January 06, 2009 06:39 PM

73s.org

Technorati Claim

Well I am trying to see if I can claim my blog here at 73s on my list for Technorati….

Technorati Profile

by N3WZR (Chuck) at January 06, 2009 06:00 PM

K9ZW

k9zw

Anti-Strategies?  What is an Anti-Strategy? Many bloggers consider their posts commentaries and “asides” to the real communication in the Amateur Radio world.   They have a point - Jeff KE9V has pointed out in his comments to this series how the timeliness that give a blog post vitality quickly fades.   The readership interested in your blog post [...]

by k9zw at January 06, 2009 05:58 PM

QRPedia

4P Universal Crystal Filter

Folks,

Attached is a multi page PDF that contains a schematic and PCB layout for a 4 pole Universal Crystal Filter. You will notice it also has provisions for impedance matching using L Networks.

The PDF should be sufficient to build from, but, the information was done in Novarm's freeware version of DIPTRACE. I highly reccommend DIPTRACE. It is more robust and bug free as compared to some of the other freebies available.

With a little "Cut/Copy and Paste" you can extend the design to more or less poles.

Let me know if you have any questions.

 

read more

by WA1FXT at January 06, 2009 05:21 PM

DX World of Ham Radio

Operating site; helo pad is behind the trees. Antennas will be on the beach and on the hill to the right.


Operating site; helo pad is behind the trees.  Antennas will be on the beach and on the hill to the right.

Operating site; helo pad is behind the trees. Antennas will be on the beach and on the hill to the right.

FOR IMMEDIATE RELEASE

January 6th, 2009

Desecheo 2009 Press Release #3

During the week of December 17-21, six members of the February 2009 Desecheo DXpedition team met in Puerto Rico. The team spent the first evening with local DXers and members of the Puerto Rico Amateur Radio League and enjoyed a wonderful dinner and a night of fellowship. The hospitality was gracious and very much appreciated.

The following day the team visited US Fish and Wildlife Headquarters in Boqueron and met with the Chief Refuge Manager and law enforcement personnel. Later that day, the DXpedition team members underwent UXO (unexploded ordnance) training. The following morning, Friday, Dec. 19th, they accompanied U.S. Fish & Wildlife law enforcement and UXO personnel to Desecheo. The campsite and antenna fields were thoroughly swept for UXO and several areas were found suspicious. These areas were clearly marked, mapped by GPS and declared off limits for the DXpedition. USFWS will allow antennas on the ridge above the helicopter pad, thus providing a clear shot to EU, NA and JA. Other antennas will be located on the beach below the helicopter pad. The only radio operation that was conducted was to test a 2m link to Puerto Rico. After three hours on the Island, the team endured a rough passage back to the mainland.

Logistics and staging of equipment is ongoing and will be complete before the team arrives in Puerto Rico on Feb. 7th. The team will transit to Desecheo on Feb. 12 to begin the two-week operation. Eight HF stations plus 6 meters will be operational. An incredible array of antennas has been planned. Transportation and logistics have been arranged for a fast deployment and quick appearance on the air.

The Desecheo 2009 team wishes to thank our sponsors for their generous support. Special thanks go to North American and Japanese DX clubs and individual DXers. Their support has been especially noteworthy.

Fundraising continues….if you or your Club would like to help out, please go to www.kp5.us/help.htm. While on the team website, click the “Pictures” menu button and check out the pictures taken on the recent reconnaissance trip to Desecheo.

73,

Co-leaders:

Bob Allphin, K4UEE

Glenn Johnson, WØGJ

      

by UPDATE at January 06, 2009 05:06 PM

QRPedia

About Those Slow Page Load Times

I'm really sorry for the inconvience, I know it's a huge pain that it's taking so long for the site to generate pages. I thought that I had the problem nailed (some very aggressive e-mail harvesting bots), but obviously it's still a problem. I will be working on it some more and will update you when I get this figured out.

by NT7S at January 06, 2009 05:02 PM

KE9V

Radio Wars

While doing some research on the Depression, (no, not the current Depression but the previous one) I happened across a 1931 article in Harpers Magazine titled, "The Battle of Radio Armaments". It was written by one Heber Blakenhorn and was sub-titled, "Broadcasting and International Friction".

I found it fascinating given that broadcasting was a mere decade old at the time it was written, yet it was more than obvious that radio had already changed the world in more ways than Marconi and the fathers could have possibly imagined.

There was even a none-too-flattering reference to the lowly radio amateur tossed in for good measure — but more on that later…

The author detailed the way that radio had quickly become recognized as an effective tool for government propaganda - and in the process, uncovered the naïveté of those who underestimated the power of the medium at their own peril.

Radio waves have absolutely no respect for national boundaries and where one nation installed a powerful new transmitter, a neighboring state would counter in a sort of Cold-War like escalation. The motto of the British Broadcasting Company may have been "Nation Shall Speak Peace Unto Nation" but the truth was that radio was broadcasting more war than peace.

In Europe, radio transmitters appeared along frontiers, facing one another as border fortresses used to do.

"Along the boundaries of Silesia four rival stations now stand within 40 miles of one another. It is hardly likely that these locations are the evidence of a pacifistic policy. When Germany set up the Muhlacker station on the Alsace border and France countered with the powerful Strasbourg transmitter, a sigh of relief went up in international radio circles because the French refrained from broadcasting the "Marseillaise" during their station’s inaugural ceremonies last Armistice Day."

It seemed obvious that these nations weren’t just speaking to other nations, but were beginning to shout. In Europe a technological race was underway to build the most powerful transmitter - three times the (then) American limit on transmitter input power. 50,000 watts soon became 120,000 and then 200,000. Not to be outdone, the Russians soon pledged $45 million dollars for the creation of their own 500,000 watt "super station" from which they would broadcast to the world.

Governments were becoming more and more particular about words. Propaganda was a recognized sin, deadlier than the old seven. Governments, that after a century pf printed journalism had hardly learned to tolerate freedom of comment in a foreign press and were similarly aghast over a single phrase in a foreign broadcast.

The world of international broadcasting also had to discover what radio amateurs had long since figured out: the world exists in a variety of seasons and time zones!

"The simplest problem of international broadcasting is time: a concert sent from New York at one o’clock Thursday on a spring night is heard in San Francisco on Wednesday night, in Poland on Thursday afternoon, in New Zealand on Friday, and in the Argentine in the autumn - all within one second."

Beyond the differences in nations that can and often do lead to war, there were cultural conflicts enough to fill volumes.

"The argument of technical difficulties is coupled with the broadcasters’ belief in the superior quality of the home program. Asking at a New York broadcasting headquarters "why so little Europe?" you are told "Americans are so accustomed to good programs that they will not stand for the inferior quality of European broadcasts." If you travel to London and ask broadcasters there why they have so few American or Continental rebroadcasts, you are told that the standard of British broadcasting is so far ahead that "we doubt our people do much listening now to foreign stations."

And the message wasn’t the only thing that brought conflict; there was no unanimous acknowledgement of the invention of the very medium itself!

"American listeners heard, after a nod to Marconi, principal credit (for the invention of radio) was confined to the research laboratories of the large American electrical companies. A British history of wireless contains mostly English names and the Marconi Company, Ltd. A French encyclopedia emphatically ascribes all the blessings of "le broadcasting" to a savant, modeste autant qui’illustre, un Francais, don’t le nom brille d’une gloire mondiale. German books hark back as firmly to Hertz."

American tourists were disturbed to find in three or four European countries bronze monuments to the inventor of the telegraph and telephone, all bearing foreign names. As if any American schoolboy could not name the Americans who invented those things, forgetting perhaps that Bell was born and trained in Scotland and Morse first designed his instrument on the ship home after a long stay in Europe.

Shortwave listeners will appreciate the whimsical description of the sounds from that age gone by and it should be no wonder that most radio amateurs baptism into the brotherhood began at the altar of shortwave radio:

"With a good set you can make fascinating journeys b y radio, though you find the air surprisingly crowded and ripped with government stations’ code messages to fleets and colonies. You can pick up the music box signal of Budapest, the nightingale note used by Italian stations, the shrill bell of Fecamp, or the deep boom of Strasbourg, the "Give akt" of Baltic stations, the "Hier sind" of German, the Dublin "Radio Ath Cliath e seo" and the "A-ah-hota see-a-ta" of Madrid."

Little has changed in the world when it comes to government mistrust of mediums of change like radio or more recently, the Internet. At the start government laid hands on the radio to control it, as in the past they also took charge of telegraphs and telephones, and frequently of railways, all "elements of the national defense."

Consider how the power of radio fanned the flames of revolution and stuck cold daggers of fear into the heart of the status quo.

"Fear was widespread last spring when the Spanish revolution succeeded. Not only were Mediterranean dictatorships opposed to broadcasting from Madrid, but in South  America a panic of radio fears arose. That first exuberant broadcast of President Zamora to the United States was relayed also to the Argentine at the insistence of a Buenos Aires newspaper. In Madrid you could hear, relayed back, the cheers of the appreciative throngs in Buenos Aires. The Argentine government immediately suppressed the offending newspaper, and there were no more broadcasts there."

Of the medium’s power, governments knew enough to fear deeply. A revolution in Brazil was prompted by radio broadcasts unsympathetic to the government causing  the president of that nation to attempt to censor radio - going so far as to send police to all the radio shops to get the names of purchasers of sets; the police then went to the homes of radio owners and took away the tubes!

When the revolution succeeded many vengeful listeners smashed and burned the shops of radio dealers who had "betrayed them".

Jamming undesirable broadcast propaganda was one tactic employed by governments and by radio amateurs with some success.

Europe probably had more reservations about Russia’s broadcasting practices than the United States in 1931 simply owing to proximity. Russian stations were famous for plopping down on any frequency, occupied or not, and broadcasting their own propaganda. You can’t really blame them - Russia wasn’t even invited to the first world conference in Washington where radio wavelengths and were coordinated.

And in Great Britain, the life-saving ring of radio marine signal stations around England (on which ships rely to steer) just so happened to transmit on a frequency that effectively jammed Moscow from being easily received in the United Kingdom.

Now here is the part you may have been waiting to read — the radio amateur is indicted as an effective "jammer" of propaganda:

"Finally there’s another element being heard from: the amateur. Hitherto he has constituted in every country much the most international element in broadcasting. But he, too, helped turn what might have been the most peaceful of occasions - the opening of the Vatican radio station by the Pope - into a bellicose affair. Deliberate interference was so widespread that the papal message was ordered repeated for a dozen countries, while Moscow was indicted as the marauder by a righteous world.

But it seems the interferences were various. Paris listeners, for example, found the Vatican wave jammed first by some distant northeastern station, second by a French station, and third by a French amateur (repeating the Morse letter "b" with good power) - all of which cleared out as the papal words ceased."

The article concludes with a prophetic warning from the author. Just two years after putting these words to paper, Adolph Hitler would begin his ascendency to power and before two more decades would pass, "science" would discover even more horrendous methods to distribute death and destruction to the masses:

"Radio in the hands of a dictator and the bureaucrat may become a means of oppression and a source of inflammatory propaganda. Threats and fears, hostile radio barriers and controversies promise little for human kind. "Science", which made for peace, devised the horrors, the gas, and liquid fires of the last war. The throttling of radio may bring about a result quite as hideous."

by Jeff at January 06, 2009 04:49 PM

SolderSmoke News

VE7BPO's Digital Logic Page

I mentioned in SolderSmoke 98 that Todd, VE7BPO, has also developed an interest in digital logic circuits. In addition to putting together a really great web page on his projects, Todd went the extra mile by homebrewing his own numerical displays. No store-bought seven segment displays for him! Check out his site: http://www.qrp.pops.net/cmos1.asp

by noreply@blogger.com (Bill N2CQR CU2JL M0HBR) at January 06, 2009 04:37 PM

QRPedia

QRPedia to Twitter Working

Thank you Jason, I should have figured out that issue on my own.

by wb8icn at January 06, 2009 04:33 PM

W7MAP

w7map

How about that sports fans. Daughter Whitney delivered twins at about 8:30 AM this morning Jan 6 2009. Jackson and Chloe seem fine and Mom doing well too. News as I receive it. Details are skimpy just now. Glad to have received a phone call! Thanks for reading. Best, Chas W7MAP/5 Posted in Radio       [...]

by w7map at January 06, 2009 03:58 PM

QRPedia

Direct Conversion Audio Amplifier Chain

This circuit was designed to work in a direct conversion receiver. With the exception of a volume control, mute circuit, and filtering, this is a complete audio chain. The amplifier is designed for a 50 Ω input impedance, which makes it suitable to follow a diode mixer. Total voltage gain is nearly 100 dB, which will provide enough gain for a reciever that contains a mixer with conversion loss. The final stage provides more than enough power to drive headphones, and might be capable of driving a small speaker.

read more

by NT7S at January 06, 2009 03:10 PM

VE3CGC

A tube power supply repair 真空管電源の修理

2009/01/06                              日本語は下にあります。

“ A repair of the homebrew tube power supply “

「真空管電源の修理」

 

I have homebrewed QRP tube HF transmitters in the past.   As the parts for tubes are getting scares and expensive, I decided to design and make a power supply for the tube rigs I have.  I had an old tube power supply unit on hand released from the Canadian Army and modified it to suit my operation of the rigs.   I made a list of parts on hand that I could use to make the power supply and designed the schematic in the spring, 2005.  The pictures be seen in the album of this blog under Jan. 6, 2009, and the schematic is available upon request by e-mail to me.

 

Specification:  It has two systems, a low voltage system ( 250 Vdc) and high voltage system (200 Vdc to 400Vdc) in one chassis.  I ended up 300Vdc, not regulated for the low voltage system and 150Vdc regulated, 300Vdc regulated and 400Vdc not regulated, as well as 5 volts AC and 6.3 volts AC.  The ampage to be drawn is not known but it is heavy duty and sufficient enough for my use, HI.

The rectifier tubes:  A 5U4G for the high voltage system and a 5W4 for the low voltage system.  No new major parts were used but all used parts.

 

I have been using it from time to time to run my tube rigs and then in November, 2008, the fuse on the high voltage system was blown out.  That was the first time having a trouble on the power supply and I tried to repair it.

 

The ARRL handbook has a section of how to repair radios and I followed the steps they recommended.  After visual inspection, I wrote down the steps I was going to take to find out the problem as follows.  The steps were written in a notebook as recommended in the handbook so that I can refer and review what I did and what happened on the each step in the future.

 

The problem defined:  The fuse on the high voltage system was blown.

 

Step one: I removed all tubes and asked VE3FBH, Frank, to check the tubes with his tube tester.   All tubes were shown sufficient as it should have.

Step two:  I started to take the voltage measurement on the primary and secondary side of the power transformer.   I confirmed no broken wire and no grounding on the transformer, so working fine.  And the voltage measurements showed adequate as it should have. 

Step three: Then I put back the 5U4G only in the socket and switched on the switch.  Then the fuse was blown.  I saw a blue spark came out from the top portion of the tube.  I could not figure out because the tube 5U4G was tested with a tube tester indicating  good.  So I installed another fuse and switched it again.  The fuse was blown again and I saw the blue spark once again for sure.

 

Step four: I looked for a spare 5U4G and found three of them in my tube box.  These 5U4G were kindly given by W9WLQ, Les, a couple years ago.   I had two TUNG-SOL 5U4G (looked to be brand new) and RCA made 5U4G.  So I installed one Tung- Sol tube as the replacement and switched it for test.  This time no trouble, and nothing was happened.  I had a BAD 5U4G tube which caused the problem.  So even the tube has been checked with a tube tester showing GOOD, the tester can NOT check everything on the tube.  Lets remember that and that is what I have learned from this repair.  And also I have to say VRY TNX to Les, W9WLQ for the replacement tubes.  It was certainly time saving and no hustle for looking for another tube.  Thanks so much, Les.

 

During the check, I found the breeder register was loosen and needed to re-solder it.  I felt very great as I found the problem and fixed it myself.

 

Happy QRPing and 73.

 

VE3CGC  Hiro,  ve3cgc@hotmail.com

 

 

In Japanese:

「真空管電源の修理」

 

2005年に私の自作した真空管式QRP送信機を動かす電源を作ることにしました。 最近は真空管に使う部品もなかなか手に入りにくくなったことと、送信機11台に電源を組み込むことも難しくなったためです。 

 

私の作った電源の写真をこのブログの、200916日のところにアップロードしましたので、見てください。配線図はメールいただければ、送ります。

出来上がった電源は電圧の高いセクションで、400V300V, 150V 及び、電圧の低いセクションで300Vが取り出せるものとなり、時々QRP送信機を動かしていました。 ところが、200811月に突然、電圧の高いセクションのヒューズが飛んでしまいました。 

 

ARRLのハンドブックを読むと、まず目視や鼻でラジオを細かく検査し、部品が焦げていたり、焼けている匂いや、銅線がはがれていたり、切れていたり、一通り見ることと書かれてありましたので、良く見ました。 これらを確認した後、次に、ノートを用意し、修理の手順を箇条書きにし、修理していく手順を書き込み、その目的や注意事項を記述し、その結果は将来参考にする、とありました。 この方法はとても良い、なぜなら、問題の追及中でも、後に、いろいろ確認する事項でも、書きとめておけば、正確で、とても参考になります。 私もこれはどなたにも勧めたいです。

 

ステップ 1:電源には5U4G(全波整流)、OC3, OA2(電圧制御)が使われ、全部の真空管をソケットから取り外し、VE3FBHフランクに真空管テスターで検査してもらい、動作を確認しました。

ステップ 2:パワートランスの1次側、2次側の電圧をテスターで計り、所定の電圧の確認と、断線やアースされていないかチェックしました。 この結果、トランスは問題なし。

ステップ 3:次に、5U4Gの球だけをソケットに差し込み、スイッチを入れると、球の上部から、青いスパークが飛び、ヒューズが飛んでしまったので、再度、新しいヒューズを取り付け、スイッチを入れました。 またもヒューズが飛んでしまいましたが、今度は、スパークをはっきり自分の目で確かに見ました。 

ステップ 4:問題は5U4Gにあると思い、スペアの5U4Gを探しました。 2年位前、W8WLQ レスからいただいた5U4G球が3本見つかり、このうち2本は見たところ、全く新しい球のようで、このうち1本をソケットに差し込み、スイッチをいれて見ました。 今度はヒューズは飛ばず、切れなかったので、OC3, OA2をソケットに差し込み、動作を確認し、電圧をはかり、全てが正常に動作しているようで、そのまま約30分くらい電気をとうした状態で様子を確認しました。 手元にスペアの球があったので、大変助かり、W8WLQにはとても感謝でした。

 

この修理で学んだことは、真空管テスタで動作を確認しても、所期の性能は確認できますが、本当に問題のある真空管かどうかはわからない、と言うことです。 真空管は良く問題を起こし、別な球と取り替えると直ることがよくあります。 今回も原因はこれだったのでしょう。 修理中に、ブリーダー抵抗器の半田がゆるみ、はずれていたのを見つけたので、しっかり、半田ズケしました。  原因を見つけ、修理できた時の気分は最高です。

 

73.            VE3CGC  はやし ひろ  ve3cgc@hotmail.com

January 06, 2009 02:34 PM

ARRL

Youth@HamRadio.Fun: A Small Island, a Young Ham and a Whole Lot of Spirit!

Mercer Island is a small island in Washington, located a few miles outside of Seattle; it has a population of approximately 22,000 people. The local radio club on the island is the Mercer Island Radio Operators (MIRO), W7MIR. MIRO is always prepared to aide with communications in the event of a natural or man-made disaster. Alex Banbury, KE7WUD, is proud to call himself the youngest member of MIRO, and possibly the youngest ham on the island!

January 06, 2009 12:56 PM

KE2YK

21c7siam9dl_sl125_


The HP Mini Netbook 21c7siam9dl_sl125_product line is a welcome change (and literally a sight for sore eyes) from our ( technically aged and challenged) Asus “Surf” EEE PC with it’s 4GB solid state drive and the oh-so-small display.  The “Surf” is now in the process of being sold and we are looking forward to test driving and purchasing one of the new Netbook products from the “HP Mini” lineup.

The 10.2 inch HP 1035NR (successor to the commercially made  HP 2131) will be the  Netbook of choice as our new addition to the technology stack in the Ham Shack.

Read the review of the HP 2140 NetBook at the Monday Cynic

Our Choice - The 1035NR as listed at the HP Official Store

Got an HP Mini? What do you think of it?  Come on, throw down a few comment lines.  I dare you!

      

by ke2yk at January 06, 2009 12:33 PM

ARRL

Gary L. Robinson, WB8ROL, Wins December QST Cover Plaque Award

The winner of the QST Cover Plaque Award for December is Gary L. Robinson, WB8ROL, for his article "Ghost QSOs -- Olivia Returns from the Noise." Congratulations, Gary! The winner of the QST Cover Plaque award -- given to the author or authors of the best article in each issue -- is determined by a vote of ARRL members on the QST Cover Plaque Poll Web page. Cast a ballot for your favorite article in the January issue by Saturday, January 31.

January 06, 2009 11:49 AM

Southgate ARC

Calling all UK CW operators!

The first UK Annual CW Table was started by Roger G3SXW and Nigel G3TXF in 1983. This year will be the 27th table and will cover all 10 amateur radio bands from 1.8 to 50 MHz

January 06, 2009 09:47 AM

RF-based TV remote runs forever on single cell

Electronics Weekly magazine has an article on a new wireless TV remote developed by GreenPeak Technologies

January 06, 2009 09:47 AM

NASA-funded study reveals hazards of severe space weather

A NASA-funded study describes how extreme solar eruptions could have severe consequences for communications, power grids and other technology on Earth

January 06, 2009 09:47 AM

Canadian Ski Marathon 2009

The CSM depends on ham radio volunteers to provide important and timely safety and logistical communication for the benefit of the skiers

January 06, 2009 09:47 AM

New Zealand operation

Listen-out for operators Jacky ZL3CW, Akinori ZL1GO, Romeo ZL2RU and Robert ZL1AIH, who will be using the callsign ZM1A

January 06, 2009 09:47 AM

RSGB President to talk at Reading

The President of the RSGB, Colin Thomas G3PSM, wil be giving a talk at Reading on Thursday 8th January

January 06, 2009 09:47 AM

IOTA news

Weekly IOTA News - compiled by Fredy, DE0MST of the Deutscher Amateur Radio Club

January 06, 2009 09:47 AM

Ascension Island

Southgate Amateur Radio Club member, Steve, G3ZVW, will be QRV again as ZD8N from Ascension Island

January 06, 2009 09:47 AM

eHam.net News

Kids Get to Ham It Up a Bit:

SCHENECTADY -- Dylan Jacobson, 7, of Clifton Park, spoke with someone from Pittsburgh, Pa., over the radio Sunday afternoon from the basement of the Schenectady Museum and Suits-Bueche Planetarium. “Hello my name is Dylan. I’m 7 years old and I can’t decide my favorite color between blue and yellow,” he said into the microphone. Jim from Pittsburgh responded and Dylan learned about Jim’s radio equipment and the weather in Pennsylvania. And he was reminded to be nice to his mother. “It was cool,” Jacobson said after the experience. Schenectady Museum Amateur Radio Association, a club of mostly middle-aged men, opened their doors to children Sunday afternoon for National Amateur Radio Kids Day. The Boring Amateur Radio Association from Oregon has been putting on the event for over a dozen years in an effort to attract more children to amateur radio.

January 06, 2009 08:48 AM

VE3CGC

Photo Album: A tube power supply repair

A tube power supply repair

psrepair1.JPG

psrepair2.JPG

psrepair3.JPG

psrepair7.JPG

psrepair6.JPG

psrepair5.JPG

psrepair4.JPG

January 06, 2009 08:45 AM

W8TN

Beverage (Antenna, That is!)

With Charlie, N8RR, having FOUR Inverted-L antennas for 160-M, he is hearing a good deal better than I. He has worked ZD8UW a couple of times and I can barely hear that station (and have no QSO's!) So, I decided to put up a Beverage antenna aimed at ZD8 and began to gather together the parts. Thankfully I had almost everything I needed. I had previously acquired the 9:1 transformer, pre-amp, and miscellaneous small parts from Lance Johnson Engineering. I had intended to put up a Beverage last fall but just had not gotten around to it.

You can see in the above photo (bottom row) ground rod clamp, insulators, split nuts (to connect the "Ground Drop" and "Feed Drop" wires, and a coax connector. I had to make a run to Radio Shack for a barrier strip, some spade lugs, and a couple of 1-K, 1-watt resistors (put in parallel they give 500 ohms.) That was a "guess" at the termination resistor. Later I'll fine-tune the antenna for the best Front-to-Back and put the exact value resistor there.


I had also previously purchased 500-feet of RG-6 coax and 500 feet of No. 14 solid copper insulated wire. I had a couple of 4-foot ground rods in the garage (one shown above) and only need to pick up a couple of ground rod clamps, some extra split nuts (in case I dropped one) and a new needle nose/wire cutter that would handle No. 10 wire. I had some No. 10 wire that I planned to use for the "Ground Drop" and "Feed Drop."

I then set about adding an additional 45-feet of No. 15 to the 500-foot spool as I was shooting for a 540-foot Beverage. Then I put spade lugs on the "Ground Drop" wire so I could easily connect it to the barrier strip where the termination resistor would be mounted. I soldered the two resistors together and to some spade lugs so they could be easily mounted. I installed a PL-259 on one end of the RG-6 and I put another PL-259 on the "Feed Drop" so I could easily connect it to the 9:1 transformer box.

After all this "prep" work, I put on my warm coat and loaded myself down with a canvas bag containing my tools, electrical tape, the prepared "Drops", the transformer, the pre-amp, spare gloves, compass, drinking water, etc. I then hung the 545-foot spool of No. 14 over the other shoulder. I stuck the two ground rods through my belt on one side and put the sledge hammer through my belt on the other. I then picked up the 500-foot spool of RG-6, several dowel rods I planned to use to support the wire (along with electric fence insulators that were in the tool bag.) And picked up my lightest step ladder and headed for the hill behind the house.

Some of you know how steep that hill is. Of course I was not able to make it down in one trip, loaded like a pack mule. I had to ferry some of the stuff down and come back for the rest. I should note that the "prep" work took a lot longer than I had planned and it was 4:30 p.m. as I descended the hill.

I quickly picked a sturdy tree to serve as the "hub" for my future "Beverage Farm" and, using the step-ladder, climbed up and secured one end of the Beverage. I then used the split nut to clamp the "Feed Drop" to that end of the Beverage and connected that to the 9:1 transformer box. Later I would connect the transformer to the pre-amp with a short length of RG-8X coax.

It was now after 5:00 p.m. and I was starting to lose the light. So I took a heading with my compass and took off into the woods. This was where the adventure began. I walked, and walked, and walked (ALL DOWNHILL) and played out the Beverage wire as I went. I utilized local supports (tree limbs, bushes, etc.) to support the wire, stopping every so often to take a new bearing. As I got within about 75-feet of the end of the wire, I ran across a place where three large trees had fallen. I had to climb over the fallen trunks and make my way through very think brush to reach the end of my trek.

At that point I had a nice tree for the end support but had to cut off about 10-feet of the wire. I had not been able to drag the step-ladder with me so I just tied it off as high up as I could reach. Here is a photo of the "front" end of the Beverage.


Yep, it's kinda dark out by now. In fact, I had to hold a flashlight in my mouth in order to do all the work at this end. I then connected the "Ground Drop" with another split nut (covering the connection with Scotch 88 electrical tape) and then used the sledge hammer to drive in the two ground rods about a foot apart. I connected the previously prepared ground wire with the spade lug to the ground rods and the spade lug end was connected to the barrier strip with the terminating resistor (the other end of the resistor was connected to the "Ground Drop.") Below you can barely see the tops of the ground rods and the ground rod clamps with the No. 10 wire connecting them.
Now I drank one of my bottles of water and took a breather before gathering up my tools and heading back. Here is where I began to think I might be out here for awhile. I could barely see the lights from my house and they looked like they were at a 45° angle from me!! Man that hill looked steep. But, I knew I had to trudge back up it and I was certainly thankful for both the flashlight and the fact that I had the Beverage wire to follow! Without that, I might STILL be wandering around down there.

It took me 25 minutes to cover that 500 feet back to the Beverage hub. I quickly connected the pre-amp and began laying out the RG-6 cable back toward the house. I had now made it back to the "haul road" behind my house, just 250 feet from my garage (but about 100 feet in elevation!) My wife, Evelyn, had called me on the cell phone 4 times by now, concerned for my safety. At this point I used the flashlight to blink at her so she could see where I was in the dark night.

I finally made it back to the top of the hill but it did take two trips to get the ladder and tools up and the RG-6. As you can see by the next photo, I did my best to insure that the antenna would play by shedding a little blood on it!


At the house (after I put away the ladder and tools) I connected the RG-6 to a PL-259 and put that into the "Power Signal" box that sends the DC voltage down to the pre-amp and returns the RF signal to the receiver.

Now comes the point in this treatise where I expected to be able to tell you that I could hear the ZD8 just like a local. However, that is not the case. The antenna seemed to not be working at all. I was crushed. I had been "over the hill" for more than 3 hours and it was nearly 8 p.m. I had spent all day on this project and had nothing to show for it.

After making what tests I could, I called Steve at Lance Johnson Engineering and he walked me through some tests that finally resulted in my replacing the cable that ran from the "Power Signal" box to the remote antenna jack on my transceiver. The first cable I had used was apparently faulty. The antenna now seemed to work but the ZD8 was not on 160-M. He was working SSB on 75-M. So, I tuned up there and worked him as I still need a confirmation for that band.

I guess I'll just have to wait for tomorrow evening for him to come back on 160-M to see if all my work will pay off. It's 2:15 a.m. now and I'm so tired and sore that I will probably sleep till noon. I'll post here again with the results of the antenna's performance once I determine what that is.

by noreply@blogger.com (W8TN) at January 06, 2009 05:58 AM

DX World of Ham Radio

UPDATE


ZK2V (Niue OC-040)

Chris ZL1CT / GM3WOJ will be QRV as ZK2V between 16th May 2009 and 20th June 2009.

This 5 week DXpedition is not a ‘holiday DXpedition’ but aims to give as many stations their first QSO with ZK2 as possible.

Resources are limited, so activity will be mainly on 80/40/20/15 CW/SSB, with some WARC band activity and some RTTY.

QSL via N3SL.

More details to follow ….

73 Chris ZL1CT / ZL1V

      

by UPDATE at January 06, 2009 05:49 AM

K2DSL

ARRL RTTY Roundup

Happy New Year! Got back home from a skiing vacation with the family and friends a few hours after the contest started and after bringing in all the luggage and doing some quick chores, I got on the air. Spent a few hours before I was tired, my back hurt and my cold I’ve had since Christmas was telling me to hit the sack. Of course, I woke up way too early and couldn’t go back to sleep, so what else to do but get on the air.  I spent most of Sunday active on the air before the 7pm ET end where I drove one daughter to an event and headed to my radio clubs monthly meeting.

I was able to log all the US entities in the contest except for ND and Wash DC. I also logged about 1/2 of the Canadian provinces.  It was fun and I need to do more CQing and less S&P. I had good (for me) rates going when I was calling CQ the couple times I did it. Didn’t use any packet clusters and just tuned around the dial. It was wall to wall so it was just quickly listening to determine if I already had a QSO with the op calling on that frequency. It’s also, oddly, less work to get on a frequency, if you can squeeze in, and call CQ vs S&P. Don’t need to touch the radio and click away with the mouse without moving.

I also see from comparing my score summary with those posted on 3830 or the RTTY mailing lists that I need to also hit up more DX contacts next time for the multipliers to increase my score.  Others with generally the same or slightly lower QSO count scored higher because of the DX multipliers.

        Band    QSOs    Pts  States  DX
         3.5     135     135   17     0
           7     110     110   13    11
          14     187     187   25     7
       Total     432     432   55    18

            Score : 31,536

Lots of fun. No new DX Entities logged but lots of fun.

73,
K2DSL

by K2DSL at January 06, 2009 02:43 AM

KB6NU

Year-End Figures

On the ARRL PR committe mailing list this morning, Allen G Pitts, W1AGP, the ARRL’s Media & PR Manager reported the following year-end statistics:

I hate to be a wet blanket, but the CIA estimates that the US population will grow by about 0.9% in 2008. If you assume that without any additional effort, the number of licensed hams would also go up by that amount, then the real increase is only about 0.3%. While that’s good, we need to do better.

Also, if the number of ARRL members increased by 1,100, then that is only a 0.7% increase (1100/153535) in the number of members, meaning that ARRL membership decreased as a percentage of licensed amateurs. In December 2007, that figure was 23.4% (153535/655842), while in December 2008 it is now 23.3% (154635/663564).

Finally, it would be interesting to know how many of those 28,066 new hams joined the League.

by Dan KB6NU at January 06, 2009 01:44 AM

73s.org

Shack relocation and new antenna

One of the big projects that we took on over the break was to move the home office/ham shack upstairs into the spare bedroom, and move the guest room downstairs where the office was located. This involved a lot of cleaning, weeding out of old stuff, donating, cragslisting, and painting.

The new shack location is much better- more spacious and better lighting thanks to a large south-facing window. I also installed a new HF antenna, replacing the G5RV with an Extended Double Zepp cut for 14.2 MHz, which seems to tune fine on 40m, 17m, 15m, and 10m. I strung this antenna in the attic space above the office and extended it out into the yard on both ends. Our lot is pretty small, so the antenna’s 86’ length just about spans out 100’ deep lot. The elements are made from 22 gauge enameled magnet wire in order to be somewhat stealthy.

So far, so good on the new antenna. I’ll report more after I make a few more contacts, but it seems to hear better than the G5RV although a direct comparison is not possible now that I’ve taken that antenna down.

I still need to run the coax into the new shack for the external VHF/UHF antenna (Diamond X50A), but for now the HT’s get out fine to the repeaters I most often use, which are about 15 miles line of site from me and at an elevation of 11,000’ ASL (the QTH is at 5600’).

More to come, time to play radio for a bit now.

by W0RMT (Bud) at January 06, 2009 12:56 AM

January 05, 2009

DX World of Ham Radio

UPDATE


From DXNL

Peter 5X4X is working as development aid worker in Arua/Uganda until June 2009.

He uses a Yaesu FT-950 (100 watts), a spiderbeam for 20-10m pointing to Europe mostly and a Zepp antenna for 40m.

Peter complains that a pirate abuses his callsign on 40m, 80m and 160m.

If you make any contacts with him in the evening hours you should be aware that the power line in Arua is cut after 2000 UTC.

The QSL manager for 5X4X is DF5GQ.

      

by UPDATE at January 05, 2009 10:32 PM

ARRL

FCC Commissioners: Now There Are Four

The term of FCC Commissioner Deborah Taylor Tate, a Republican from Tennessee, came to an end on January 3 as the 111th Congress convened for the first time. Originally selected by President Bush to fill the unexpired term of then-Chairman Michael Powell, Tate joined the Commission in 2005. In June 2007, Bush announced his intention to nominate Tate to a full five year term, but when the Senate failed to confirm her nomination by the close of the 110th Congress, Tate's tenure as a Commissioner came to a close.

January 05, 2009 09:55 PM

eHam.net News

WSPRnet

SPOTTED POWER LEVEL

Hi all,

I looked in the database today and found sometimes a strong difference in receiving and transmitting level of some stations over the last months.

Can it be that the spotted TX power level in the database is not correct....

I am using ERP Scale ...5W ERP means around ...37dBm

73 de michael DG0OPK

by dg0opk at January 05, 2009 09:49 PM

AC7FA

Wooot! K7OG Will Certainly Make It To K5ZD’s Partial Check DB

I know K7OG will be K5ZD’s super check partial lookup database because I worked K5ZD during the ARRL RTTY Round Up. Hah! I don’t have to depend on submitting a log or hoping for some other operator to submit their log.

The RTTY Round Up contest was pretty fun. Just casually, I worked over 100 stations with 38 domestic and 5 DX multipliers. RTTY lacks a certain amount of excitement for me. It starts to boil down to Read the Call, Type or Click the Call, Ask for a Fill or Hit the Exchange F key, and Hit Enter. At one point I was falling asleep at the computer. Having a running IM chat with Matt KR7W kept me awake - and this was in the middle of the day when I had had plenty of sleep. SSB and CW just seems more interactive where at least you have to copy and comprehend the exchange in your brain before logging the contact. No disrespect to RTTY fans intended. Once you have the computer set up, the rest is pretty automatic though. Maybe its different if you are DX or a rare section. The only ND station I heard was running a giant pile-up and frankly, showing some frustration at how rude some of the callers were. I ran CQ in the last 30 minutes of the contest because by then, the big contest stations have worked everyone and operators are willing to try to dig out some weak ones. I worked ID that way.

My little IC-718 works great for RTTY. RTTY is one of the selectable modes and the 500K CW filter I have installed narrows the passband right down onto the signal. It helps to have my microHAM MicroKeyer feeding FSK directly to the rig too. Makes my RTTY signal very clean indeed. I like using DM780 for general CW logging but the software doesn’t cut it for RTTY. It doesn’t have an option to push data out through a serial port and will only generate soundcard RTTY. Good enough if you take the time to get all of the sound card settings right but who has time for that?

by Don (AC7FA) at January 05, 2009 08:25 PM

ARRL

Foundation for Amateur Radio Invites Scholarship Applications

The non-profit Foundation for Amateur Radio (FAR) is now accepting applications for 48 scholarships for the academic year 2009-2010 to assist radio amateurs pursuing higher education. FAR fully funds two of scholarships and administers 46 others without cost on behalf of various club and individual donors. Amateur Radio licensees pursuing a full-time course of study beyond high school and accepted by or enrolled in an accredited university, college or technical school are eligible to apply. Scholarship grants range from $500 to $5000, and preference in some cases goes to applicants living in particular geographical areas or pursuing certain studies. Non-US residents are eligible to apply for some of the scholarships. FAR encourages clubs -- especially those in California, Delaware, Maryland, Ohio, Pennsylvania, Texas, Virginia and Wisconsin -- to announce these scholarship opportunities at meetings, in newsletters, during training classes, on nets and on their Web sites. More information and an application form may be requested by letter via e-mail or by sending a QSL card postmarked prior to March 30, 2009, to FAR Scholarships, PO Box 831, Riverdale, MD 20738. The application deadline is May 1, 2009. Headquartered in Washington, DC, FAR consists of more than 75 area Amateur Radio Clubs. FAR is devoted to promoting the interests of Amateur Radio and those scientific, literary and educational pursuits that advance the purposes of the Amateur Radio Service.

January 05, 2009 07:32 PM

Son Charged with Murder of Florida Ham

Robert Farley, of Lakeland Florida, has been charged with first degree murder in the death of his father Walter Farley, K4QE, also of Lakeland. The Ledger, a newspaper in Farley's hometown, reported that authorities allege Robert killed his father New Year's Eve during an argument over family matters. Walter Farley was 93. Authorities said that on Saturday, January 3, Robert Farley confessed to the killing and led detectives to a lake where he had discarded the murder weapon; the weapon was recovered by dive team members later that afternoon. Walter Farley served in the US Army during World War II as a telephone and radio repairman. He fixed tape recorders for the blind and was involved with the local historical society. A member of the Lakeland Amateur Radio Club, Walter was active on local Nets.

January 05, 2009 07:19 PM

K9JY

Would your government give you a permit for this tower?

OH8X 160/80 Tower and AntennasI really love the hams from OH. They think big, think tall, and look for the most out of their antennas. Since they get hit too often with all that aurora stuff, they try and compensate with bigger, stronger, and better antennas.

If you are in a low point of the solar cycle, build bigger and better antennas for the lowbands.

Like this announcement from OH8X:

It’s well known that the bigger and higher the antenna, the better results you’ll get. The new 3-element 160m antenna at OH8X must be about as big as you can get. Look out for a strong signal from them during 2009.The new antenna for the 160m Amateur Radio band was completed just in time for Christmas on 24th December after OH8SR and OH6RM had spent three weeks installing it.The Arcala Extremes station OH8X is located at Arkala 65.18N, 26.24E.

The specs? 100 meter tall tower (not feet, but meters). 60 meter booms for both 80 and 160 meters. and five 80-meter full size elements.

You can see the picture on the Facebook site.

Would your local government provide you permits to put up this antenna support structure?

Me neither. But it sure looks nice!

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by Scot, K9JY at January 05, 2009 07:11 PM

N1VG

Finding a New Bank

When I set up my business checking account back in '04, I decided to go with a local bank - Mid-State Bank & Trust - on the theory that they'd be more likely to provide decent customer service. I'd had bad experiences in the past with both Bank of America and Wells Fargo, and I'd vowed that Wells Fargo in particular would never get another dime of my business. (The reasons are numerous - look up their class action lawsuits and take your pick.)

Some months ago Mid-State was acquired by Rabobank, and I'd hoped that being part of a big multinational bank might improve some of their online services; the website had always been terribly clunky and difficult to use. Alas, it's gotten far worse since then. I can no longer make payments on my line of credit, the system won't work with Firefox, and doing the most trivial of tasks is frustrating.

Worse, their service has really gone downhill. I'm currently missing a wire transfer and despite promises to track it down, I've heard nothing. It's a common pattern - call them up with a problem, they promise to look into it, and then nothing. I'm also missing mailings from them, important stuff like a routing number change that ended in me having to destroy 500 unused checks. And every time I send a wire transfer, the confirmation email comes from (and the return receipt goes to) a domain held by a squatter. Rabobank won't acknowledge the problem - like maybe they don't think that could be a massive invitation for phishing.

So today I decided to contact a few big banks with the same simple set of questions - can I make international wire transfers through your online banking system, can they be in foreign currencies, and what's the transfer fee? How the banks respond to the message (sent through their online contact form) will be as important as the actual answer - I'm tired of dealing with a bank that won't get anything done unless you park yourself physically in a branch.

I'll update this as it progresses, but here are the results so far. All questions were submitted at around 10:00 AM on January 5.

Union Bank of California
Immediate auto-confirmation by email promising response in 1 business day.

Received an email at 2:30 PM stating that online wire transfers are possible and to call a representative.

Called 800 number at 4:10 PM, got a recording (in English and Japanese) telling me to leave a message for a call-back within one day. Left a message.

WaMu
No response yet.

HSBC
No email response yet.

Called toll-free number (it has a 'Z' in it!) and spoke to a very friendly rep after navigating a reasonably short voice menu. Found out that they offer $15 wires (incoming and outgoing) and several currencies, and that they have an option for 5 free transfers a month. Also found out that I can't open an account because there's no branch close enough and they have to make a site visit. I was very pleased with the customer service, but it unfortunately it does me absolutely no good!

Wells Fargo
No response yet.

Bank of America
1:30 PM - Got a form letter response advising me to call the wire transfer department. Called, got a voice response system. Got to a live operator, was informed there's no online wire transfer option. Outgoing wires are $45, she didn't know incoming rates or currency exchange fees.

So far I'm really not impressed with anyone's responses.

by noreply@blogger.com (N1VG) at January 05, 2009 06:55 PM

KA3DRR

Band-Pass Filter | Detector | Exclusive OR Gate | High-Pass Filter | Low-Pass Filter | Truth Table

Band-pass filter.
  • A circuit that allows signals to pass only if they are within a specific range of frequencies. This circuit attenuates signals above and below this range (Wolfgang, L., Reed, D., and Carman, R., 2007).
Detector.
  • A circuit used in a receiver to recover modulation signal from the RF signal (Wolfgang, L., Reed, D., and Carman, R., 2007).
Exclusive OR gate.
  • A logic circuit. Output is 1 when single input is 1 and output is 0 when no input is 1 or when more than one input is one (Wolfgang, L., Reed, D., and Carman, R., 2007).
High-pass filter.
  • Allows signals above cutoff frequency to pass however attenuates signals below the cutoff frequency (Wolfgang, L., Reed, D., and Carman, R., 2007).
Low-pass filter.
  • All signals below cutoff frequency to pass however attenuates signals above the cutoff frequency (Wolfgang, L., Reed, D., and Carman, R., 2007).
Reference: Wolfgang L,, Reed, D., and Carman, J., (2007). [8th ed.] Extra Class License Manual. ARRL-The national association for amateur radio. Newington, Ct. 06111.

by Scot R. Morrison (noreply@blogger.com) at January 05, 2009 06:39 PM

N1WBV

Twitter Phish: Non-Event or end of the “Good Ol’ Days”?

Link many other Twitter users this weekend, I got the following DM from someone I followed:

Hey, i found a website with your pic on it… LOL check it out here <link>

As soon as it arrived, my spidey sense went off:

  • Unsolicted? Check.
  • Vague message? Yup.
  • Wants me to click on a link? Indeed.

This  instantaneously causes me to think “Bad link! Do not click!” and I quickly tweeted my concerns. Thankfully many people did the same which probably saved more then a few people from clicking the link. It did garner a fair bit of attention since this was the first-ever phish that came via DMs on Twitter and some people are seeing strange activity on certain accounts, but for the most part it has faded back into the noise of a usual Monday morning on Twitter.

This was bad, and I feel it was the opening salvo in a major change in the way spammers operate on Twitter, but I think the worse may be yet to come. For those of you not on Twitter, the way spammers have been operating is by setting up an account, following a lot of people, then waiting for the unsuspecting users to follow back. Once they feel that enough people have started following them, they start spamming their links. Now, with the phishing attempts, they can cut out the middle man and start spamming your follower lists with their links. Ruh Roh Shaggy…

Now, lets ratchet this up to the next level. Imagine if the phishing page had some kind of exploit embedded into it? Let’s say @britneyspears posts “Hey guys, check out my new track at (link)!” Thousands of devoted Britney Spears fans clamor to hear their idol’s screeches talents and are directed to a page telling them to log in with their twitter ID. That page exploits their browser and assigns them to a botnet. The few who think Twitter is trustworthy fork over their credentials, at which point a PHP script logs into their Twitter account and DMs all their friends the same link with a random headline.

Lather.
Rinse.
Repeat.

Congratulations! We now have the first Twitter worm! With Twitters somewhat notorious instability under high load, at which point would we see a Twitter DoS?

This Twitter phish was bad. However, I think the community dodged a bullet and we may not be so lucky next time. Many people think Twitter is a safe sandbox on the Internet and not the same as their e-mail or IM. The million dollar question is how can we teach people that Twitter can be a nasty place before “the big one” hits?

by Innismir at January 05, 2009 06:23 PM

W7MAP

w7map


2008 is now history. May it RIP and never, and I mean never, should we speak of it again.  When I recall that fateful year I begin to understand what 1929 felt like before people got hungry. Nuff of that.

I added a couple of nice links to my “Good Stuff” right margin links area this weekend. Both are from Japanese stations and both are in English. There are some pretty good blogs out there dedicated to the Art of Morse but these were both pretty good reads with a mixture of radio, Morse and eclectic topics that I always find enlightening. One is Brass Pounder’s Cafe and the other is CW4EVER. The latest post on Brass Pounder’s was interesting as it began to address some weighty questions I have been wondering about since I took up the ancient practice of code.  In this case Leo wondered aloud about his sons interest in medium wave listening. Extending that discussion here and broadening it a bit  will undoubtedly lead to other questions like,”how much time does this guy have on his hands anyway”? Answer: Too much!

For instance: What ever happened to curiosity? My kids do not seem to have a lot of that trait. That has been troubling to me because I value curiosity pretty highly. I do not know if this is correct, but I see a correlation between electronic media in the form of TV, Internet, Games and other modern force feeding of information/entertainment to a growing lack of curiosity. I could be (and probably am) all wet on this subject, however, the constant bombardment of electronic media and the attendant reduction in creative play and reading seems to go hand in hand with a decrease in curiosity. Obviously a question for anthropologists in another century.

Why CW? Uh Oh. Here we go again. I have finally tumbled onto my rationale for my affliction with Morse. It satisfies several very real needs. First I have a need to play an instrument. I used to play (don’t laugh now) the cello. That was pretty cool believe it or not and filled some inner need for me. I also like to listen to music. Perhaps the two go hand in hand? Who knows but Morse seems to fill that void. On another level we could ask why Morse or why QRP or in fact why even Ham Radio? Here again I have a suggested answer that satisfies my personal equation. In my case, I enjoy being independant of all the complications of modern society. With very little effort I could communicate by being off-grid with respect to power and also all the complications involved with using any other form of communications. Mind you I have not done this off-grid yet, but I am comforted by the knowledge that I could easily should the need arise. All other forms of communications  are dependent on AC power, Central Offices, Cell Towers, Server Farms, and a bunch of other dependencies I haven’t even thought of yet. With “Just in Time Everything”, societal dependencies are everywhere and uncomfortably fragile for my sensibilities. So there it is; Morse and Ham Radio tame my sense of security and feed my aesthetic self. Not to mention it is a great platform for learning and rumor has it copying code is a way to stave off Alzheimer’s. :)

http://johnkayceedee.blogspot.com/ is another blog that I found very interesting but may not be for all readers.

New Years resolution: Work to get my lousy sending as proficient as my ability to copy code in my head. My fist is lagging my code copying abilities by some large margin.

Thanks for reading and Best, Chas, W7MAP/5

      

by w7map at January 05, 2009 05:25 PM

KE9V

Steve Jobs is OK

Apple fans can finally unclench. A little. The persistent rumors about Steve Jobs on his deathbed were not accurate. He’s sick, but not dying — well, at least not dying any more than the rest of us.

He puts the rumors to rest with this personal letter.

by Jeff at January 05, 2009 03:48 PM

M0KHZ

Possible improvements to current H mode mixer performance

This is a short blog update, pointing the reader to visit Mike Monett’s, Precision System Technologies, web site.

Following the announcement from Martin - PA3AKE regarding the AM noise issue from the current top end DDS chips from Analog Devices, Mike contacted me with some very interesting and helpful information. Mike has developed a couple of techniques to improve the output of a 74AC04 hex inverter, commonly used to convert sine wave to square wave in SDR’s and H mode mixers. For the experimenter I highly recommend following this link:

http://pstca.com/spice/74ac04/limiter.htm

Mike has also investigated the effects of power supply ripple on the above inverter, this also very good reading, once again I highly recommend following this link:

http://pstca.com/spice/ripple/ripple.htm

And to finish this update, I’ll point you to another page from Mike’s site regarding separation of ground plains around switching logic.

http://pstca.com/spice/pstpp/pstpp.htm

All of the above information will be of interest to the experimenter, I believe this information may also lead to increased performance from the current ‘state of the art’ H mode mixer.

End of update.

by M0KHZ - Kevin at January 05, 2009 03:20 PM

K2DBK

Antenna Modeling

Terry, WX7S, is posting a series of article on his blog about antenna modeling. There are already numerous resources that cover this topic, but I like Terry's approach of breaking things down into pretty short topics. The information is great, but there isn't so much of it all at once that your eyes glaze over. The series is available on his blog, here's a link to the first post. You can find the entire series (and more) by clicking on the Antenna Modeling Category heading on his blog.

by David (noreply@blogger.com) at January 05, 2009 03:18 PM

ARRL

ARRL In Action: What Have We Been Up To Lately?

This feature -- including convenient Web links to useful information -- is a concise monthly update of some of the things ARRL is doing on behalf of its members. This installment covers the month of December.

January 05, 2009 01:00 PM

9W2CBL

QSL Card - HS1EAX

Quite a while I haven't posted up my QSL card received nor I haven't receive any inbound QSL card lately from the contact that I have done.

Today I reach home after my work, I was surprise to see a enveloped on my table. Open it up and take a look from who send it to me. Well is my constant contact on Satellite communication -  HS1EAX - Mr. Subin Visuthsiri

This is the QSL card for the contact of AO-51 establish on 8th Feb 2008.
 
 

Thanks for the QSL card, Looking forward again in Satellite communication.

73!

by noreply@blogger.com (9W2CBL) at January 05, 2009 12:27 PM

Sands Contest Group

QSL Cards Ready To Go!


All cards for Jura now packed up and ready to go, despite nearly wrapping the cat up in one of the boxes! These are the cards going direct to the RSGB for distribution. Anyone who has sent a card direct to us should also have their QSL going out this week as well. Sorry for the delay but we thought it was probably a good thing to wait until the Christmas season was over and done with.

by noreply@blogger.com (Sands Contest Group.) at January 05, 2009 11:37 AM

SM0FOB

Yellow-browed Bunting - A first for Sweden

A Yellow-browed Bunting (gulbrynad sparv) has been seen for the first time in Sweden, close to Stockholm (Norra Järvafältet). The first observation was on January 3.
Photo by Tommy Holmgren, January 4. 

This photo by my pal Lennart Jalmarsson shows the massive concentration of Birders this morning waiting for the rare bird. Here is Lennart´s report (sorry in Swedish):

I gryningen tog jag mig ut till obsplatsen. Där var redan ett hundratal skådare. Många hade rest hela natten från Skåne, Halland och övre Norrland. T.o.m några danskar var på plats. Allt medan det blev ljusare så steg förväntningarna och hela tiden strömmade det till skådare. Vid matningsplatsen (vi stod 30 m därifrån) vimlade det av mesar och finkar. Exakt 0847 dök sparven upp och det var som en stöt gick igenom hela församlingen. Därefter ett skrikande om ritktning och distans i förhållande till olika riktmärken. Sedan fokuserande och knäppande. Nästan som på en presskonferans. Efter att ha hoppat hit och dit under cirka fem minuter drog sig sparven tillbaka. Jag pratade med några som varit där alla dagar från morgon till kväll och de berättade att fågeln under föregående dagar hade uppträtt på liknande sätt. Synlig fem minuter och sedan borta några timmar och så plötsligt dyker den upp igen.

Det kommmer säkert att diskuteras mycket och länge om fågeln är spontan och om den i så fall är äkta och inte en hybrid. För närvarande lutar det åt hane 2k+.

Jag har inga bilder på fågeln. det finns åtskilliga på olika ställen på nätet. På youtube finns det dessutom en filmsnutt. Jag bifogar en bild på skådarförsamlingen tagen när jag anländer till platsen. När jag går därifrån är det säkert dubbelt så många.

Lennart

by noreply@blogger.com (Kjell Bergqvist, SM0FOB) at January 05, 2009 11:05 AM

KB9MWR

70 CM HSMM?


What you are looking at is Ubiquiti's 2.4 GHz bullet. It's their simplest, and cheapest ($40) 802.11 device. It's basically a ethernet->N converter. Now imagine if it was capable of 420-450 MHz.  

Ubiquiti products are based on the Atheros chipset which allows you to reduce your channel width with to 5 MHz. This would fit in the lower 12 MHz of the band where ATV is allowed, and can still yield up to a 10 Mbps signaling rate. That kind of throughput can support live video feeds from IP cameras, Asterisk / IP telephony, and just about anything you can dream up.

When WiMAX platforms for operation around 3 GHz were in their planning stage, Ubiquiti acted quickly to provide a 3 GHz 802.11 solution for direct competiton. That worked out well for us hams, as there is a 3 GHz ham allocation.    

WiMAX is much like ordinary Wifi except it uses licensed spectrum. Its for last mile connectivity, and the potential of mobile operations. Verizon wireless broadband is probably the most best example that most might be familiar with.
There are certified WiMAX platforms emerging for operation between 400-1000 MHz, covering the 70 and 33 cm bands, with selectable channel widths from 1.5 MHZ to 7 MHz. So a 400 MHz capable product from Ubiquiti doesn't seem that far fetched. 

If you have experimented on 2.4 GHz, you know how frustrating it can be trying to combat the high noise floor and plethora of Part 15 devices. When you utilize the channels unshared with Part 15, you still at best, are limited by the line of site propagation of those microwave bands. HSMM experimenters are usually few and far between so an organized approach to commercial tower sites is likely not the case. This is what would make a 420-450 MHz capable device ideal.

If the idea of 70 cm HSMM appeals to you, I encourage you to vocalize your interest.

by kb9mwr (noreply@blogger.com) at January 05, 2009 10:36 AM

eHam.net News

ACMA Publishes Revisions to the Radiofrequency Spectrum Plan:

On the 2nd January 2009, the "Australian Radiofrequency Spectrum Plan"(ARSP), was published on the ACMA website. The new ARSP can also be found in the Members Area of the WIA website under Legislation which is in the Reference Section.

January 05, 2009 08:48 AM

QRPedia

Willamette Progress - 1/4/09

Receiver portion is installed but still have to align.  Trying to decide what to put the VFO in and if the entire Willamette will be in a box or just the VFO. Have some scrap copper clad board that could be cut up to make a 8" x 5" x 3" (W-D-H) that would hold the Hammond box, main board, and still have room for add-ons like a keyer, +10 watt amp, antenna tuner (balance and unbalanced), etc. For now, I may just use a Hammond Box to hold the VFO so I can align the receiver and finish the project.

read more

by wb8icn at January 05, 2009 06:52 AM

Southgate ARC

JAMSAT announces Amateur Satellite to Venus

AMSAT has received news from Japan that JARL/JAMSAT are collaborating with the Japanese University Space Engineering Consortium (UNISEC) to send an amateur radio payload into a Venus transfer orbit with the primary JAXA Planet-C Venus Orbiter mission planned for May, 2010