There is buzzing a new phenomenon at PI4RCG (our local HAM club): the WSPR-challenge. One prominent club member, Remco PA3FYM, founded this WSPR-challenge with Richard PE1ITR. Essentially they download the whole WSPR-spot-database once every night and parse it in a top 50. The result changes per day. This challenge only consist of reported spots to wsprnet.org. So you can sneak peak at wsprnet.org site to see your uniques. Since wsprnet.org only logs your reported spots, this challenge is actually a RX-only contest. Continue reading →
Did a lot of work the other night at the 23cm trx. Build in the speaker (drilled a lot of holes!) and did the last mod to do more filtering in the VCO voltage. Also fixed the phantom power for the electret microphone. Modulation and LF-sound are now in an acceptable range. There is always room for improvement, but at least I can leave this little puppy running in the background without scaring up every time some one opens the repeater.
Now I have my ‘reference rig’ I found out the filtering of the 23cm TRX is indeed under average. The reference rig can easily hear repeaters from miles away and doesn’t have a S6 to S7 noise without an signal. I think the UMTS-antenna that is about 50 meters away must have something to do with this. I think the next to do for this trx is building a bandpass filter.
After a second test resulting in a working display yesterday evening, my 2nd attempt to get a breadboard version of K3NG’s Arduino CW keyer up and running turns out to be a success!
This morning I soldered a female mini-jack and a speaker to the Arduino Nano and set the right pins in the Arduino IDE. After a upload/reboot the keyer came up and it works perfectly!
I really like this Arduino stuff. It is simple to figure out and the fact that it is open source (software as well as hardware) makes things easy and quick to work with. Hats off to the author of the keyer code: K3NG Radio Artisan.
I still have to try connect the keyer to a rig. The fact that you can use one paddle to key multiple rigs, I think is ideal. That way I never have to unplug my paddle from the TS-590 and plug it in the Elecraft K1 or the other way around. You can even connect as much as eight rigs! I don’t think a Arduino Nano has enough connections for it, but the software can do it.
Actually I think I will buy a Arduino Uno for this project so I have enough connections for all kind of options to activate. As controller I considering a rotary encoder. A separate power supply is needed too as you can see the display dimmed when the speaker makes sound.
And then the hardest part; find and build the whole thing in a nice case!