PA3GYK's blog

How about the following idea?

A special activity on a pre chosen band on a pre chosen day.

Split the wspr band in two parts (lower and upper 100Hz)
Use the upper 100 Hz for wspr beacon mode, max 20%tx max 1Watt (wspr software).
Use the lower 100 Hz for wsjt qso mode (mode wspr) max 1Watt. (WSJT7 software).
One could use the two programs at the same time, however if you wish to make a qso you have to switch wspr in rx mode for the time of the qso, (no big deal).
So one could try to call a station seen in the upper 100Hz and make a qso in the lower 100Hz, (and send a qsl?).

playing around with wspr on several systems at the same moment, i found out that there was a difference in time (wspr program) after a few hours.
One clock was about 30 seconds ahead of the other computer.
However i synchronize (ntp) the clocks in windows (every 24 hours).
But that seems not to be enough for some computers, gives a difference of minutes per day!
Timing is very crucial in WSPR , the more your of timing, the less spots you get.

On the web a found a freeware program called 'automachron'.


I am running a wspr station for a couple of weeks now, and 'its fun!'

Station Setup here:
8 meter vertical on a steel grid, atu at the feeding point.
homebrew FD3 (40-80mband)
TS430 modified (so i can use cw if filter (250HZ) in ssb mode).
mfj784b dsp filter tuned at a 225HZ bandwith.
Homebrew interface to cpu with 1:1 transformers, ptt = vox driven.
power meter, calibrated, measuring down to 10mW

This morning a made a 3D snapshot of T61AA's signal on 17m.
Special about it is the crossing carrier, that hops the band in and out over here.