Tom's Receiver with Hybrid Cascode IF

I really like Tom's videos (and the receivers that are in them). Thanks Tom!

Micro-watt WSPRing by Gene, W3PM

Hi Bill,

As you know by your experience using 20 milliwatts, Weak Signal Propagation Reporting (WSPR) is an excellent mode to experiment with low power. A QRPp experimenter can received near instantaneous automated reports over the internet from hundreds of stations throughout the globe.

During the last few days, I have been experimenting on 30 meters with output powers as low as 20 microwatts. No one has spotted my 0.00002 watt signal yet, but K8CXM has spotted my 50 microwatt signal at a distance of 553 KM at 2332UTC, 05 AUG 09.

I used a 100 mW GPS timed beacon with a step attenuator to an indoor doublet for all the tests. All equipment is homebrew and the output power is verified with a HP-432A Power Meter. If you look in the WSPR on-line database the power is reported as 0.100 watt because it was too difficult to pull out and reprogram the beacon’s PIC controller chip for each change of power. In any case, there are no provisions to report power levels below 1 milliwatt to the WSPR database.

Other noteworthy spots:
100 uW - K8CXM, 2252UTC, 05 AUG 09, 553 KM
200 uW - AI4SA, 0530 UTC, 02 AUG 09, 333 KM
500 uW - NJ0U, multiple spots 31 JUL & 01 AUG 09, 716 KM
500 uW - K1JT, 1440 UTC, 31 JUL 09, 1215 KM
500 uW - W3HH, 1240 UTC, 31 JUL 09, 764 KM
5 mW - VK6DI, 2232 UTC, 05 DEC 08, 17,858 KM

A 6.5 meter auto tuned vertical with 50 ground radials was used for the VK6DI report. The vertical is disguised as a birdhouse support because I live in an antenna restricted neighborhood.

Of course all the credit goes to the receiving stations that no doubt live in a very quiet RF environment. The reports do not represent any records, but they may be of interest to other QRPp experimenters. .

Gene W3PM

Sabina QRP Station and Astronomical Observatory

This year, in an effort to get the kids out of Rome, we rented a summer house out in the Sabine Hills, a beautiful area just one hour north of the city. The picture shows a typical scene from the region. I brought out my HW-8, a gel-cell battery, my VW solar panel, the pi-network antenna tuner I picked up at the Trastevere flea market last winter, and about 50 feet of AC zip cord. I threw the wire into a tree and was able to tune up on 20 and 40. First station worked was near Catania, in Sicily (close to where we stayed last month). Also worked Germany and Bulgaria. I hope to use one of the tall Roman pines (like the one in the picture above) to support a vertical wire.

I also have my telescope out at the summer place, and we used it last weekend to look at Jupiter. I couldn't see the recently discovered scar, but we got great views of the clouds, and the four Galilean moons. More to follow...

Chuck Penson -- Heathkits, Nukes, and QRP

Back in my days as an anchor-ologist (a fan of old, heavy "Boatanchors" radios), I frequently consulted Chuck Penson's wonderful book about Heathkits. I was glad to see that he has developed an interest in QRP and is going to speak at CactusCon. Here is what the AZ Scorpion web site had to say about Chuck:

Chuck has a background in industrial archeology and a passion of the history of science and technology, with a special interest in nuclear weapons. He recently retired from the University of Arizona and now spends his time as the historian for the Titan Missile Museum in Green Valley Arizona. He is the author of two books: "Heathkit--A Guide to the Amateur Radio Products" and more recenty "The Titan II Handbook: A Civilian's Guide to the Most Powerful ICBM America Ever Built."

Penson has been a ham radio operator since 1966 and currently holds an advanced class license. His other interests include renewable energy, astronomy, hiking and pizza. He lives with his wife, Kathryn, at their off-the-grid ranch in the desert west of Tucson.

Arizona Scorpions and CactusCon

A message to QRP-L from Paul Harden, NA5N about this event almost had me seeking flight reservations. It really sounds great. Wish I could go. But wait! A virtual visit is possible, because they plan on providing live video streams of the presentations. And last year's talks are also available. Go Scorpions! Check it out:
http://www.azscqrpions.org/CactusCon2009.htm

Shep: UHF and Deep Space Communications

On this one, it takes a while for Shep to get to the radio stuff, but it is worth the wait. Or you could fast forward to around the half-way point (but in doing so you will miss the commercial for Miller High-Life, and Shep's discussions of Monolopy and the Game of Love).

http://ia310115.us.archive.org/2/items/JeanShepherd1965Pt1/1965_04_15_Radio_Signals.mp3

Shep: CW, Conrad, Lake Erie Swing, QRP ops (2 Watts on 20)

April 13, 1965. Jean Shepherd discusses Morse Code, propagation, the Signal Corps and a QRP adventure on 20 Meters. You guys will love this one. Thanks to Bob, N1BE for sending this along. More tomorrow.

http://ia310114.us.archive.org/2/items/JeanShepherd1965Pt1/1965_04_13_Code_School.mp3