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10m WSPR spots @ G4ILO 17 November 2012

Another day of good propagation. I don’t know why OH1CO was using the suffix /QRP (aren’t most WSPRers using 5w or less?) but it really upset the WSPR encoding algorithm. His call was being decoded at my end as OH1/P00XEK!

I’m starting to believe that my attic dipole does have magical powers on 10 metres. Right now I’m hearing or being heard by 8 different stations but they are only hearing or being heard by me!

A stop-over on my way from Sydney to Oslo gave me the opportunity today to visit Apliu street in Hong Kong. This is where all the electronics products are found. As I had purchased a Baofeng UV-5R from them before it was fun to stop by the 409shop as well. Their address is on their web site, and the word “showroom” really made me expect something larger than what I found. It turns out to be just one small store among hundreds of others in this street.

I bought a handheld frequency counter, Yaege FC-1, and a better antenna, Nagoya NA-666,  for the UV-5R and got a good deal – I like to think that it is because I presented myself as a previous internet customer.

On the other side of the street there was another store with communications equipment as well, Yee Fu Technology Shop, where I bought a 13.8V/20 A switch mode power supply, HK Products Electronics SPS-200MA.

It even had a noise-offset control which I have come to appreciate in my other power supply, the Alinco DM-330MV. It is particularly nice to have on 160 m. How they avoid Alinco’s pending patent on this feature is something I don’t know. There seems to be several other supplies on the market with this feature also, such as the Watson Power-Mite-NF (NF for Noise offset Function), so maybe Alinco’s patent application hasn’t been granted?

It was nice to hear from Mark M0DEV following our exchange of WSPR signals on 144MHz. It turned out that I was the most distant WSPR signal that he’d heard on 144MHz at that point. We decided it would be fun to try a QSO and decided that since we both used JT65-HF regularly, we’d use that rather than the more usual variant for VHF/UHF JT65B.

Running 10W at each end, both into collinears, it was an easy QSO over a path of around 140km. Not massive DX of course, but very satisfying. Following a successful exchange of signals we then turned down our power as low as it would go – around 1W in my case and were still easy able to exchange signals. Mark calculated that given the conditions at the time, around 150mW would have probably done the trick. Sadly I can’t run that little power – at least not readily!

Diz, W8DIZ of Kits and Parts dot Com, has come out with a new transceiver kit – The Flying Pigs “PigRig”.

It is a single frequency transceiver.  Sound strange?  Maybe it is, but listen to Diz’s own words:

“This transceiver was designed for Radio Clubs and/or Special Events. You turn the radio on…you listen…you do not tune…you do not switch anything…you do not search. If you hear someone on “your special frequency”, there is a good chance it could be a member of your group.

Here is what it is and is not.

It is a club radio.
It is not another me-too qrp contender
It is a single conversion design
It does not receive 2 sidebands…only one
It does have a full 5 watts output at about 13.6 volts
It does not have any tuning controls
It does have a piggie custom keyer chip
It is like a ham version of Channel 19 using CW only

The size of the PCB is only 2.5″ (63,5 mm) by 3.8″ (96,5 mm), and Yes…it does produce a full 4.99 watts RF out and it is as sensitive as just about anything else that you may have in your radio shack. Custom club/group frequencies are available for 40 meters. The name of this radio shall henceforth be labeled as the “Flying Pig Rig”.

For details – schematic and building guide as well as information on how to order, click here.

72 de Larry W2LJ
QRP – When you care to send the very least!