I seem to be a bit deaf to WSPR…

June 24, 2013 | Amateur Radio | By: Mark VandeWettering

For the first time in a couple of years, I got all my equipment back online in the WSPR mode. I used to run WSPR primarilly with my little Yaesu FT-817, but this time, I chose to go ahead and use my ICOM IC-735, which isn’t a really all that great at WSPR-ing: it is, after all a rig capable of a full 100W output, and even on its lowest power setting should beam out 10W of power. I’ve also suspected that in comparison to the receiver in the FT-817, it’s a bit deaf: it simply can’t hear weak signals.

Last night I left it simply listening on the 30m band. In previous attempts at WSPR, I could expect to hear signals from a couple of dozen different stations. In the last four hours, I’ve gotten two: NM7J in New Mexico and JQ2WDO in Japan. I think it’s a receiver/antenna issue, since I’m not seeing signals in the waterfall which aren’t being decoded: I’m simply not hearing them.

I’m going to move my monitor up to 20m for the day, and see how that works. But I think some antenna testing and maybe trying my trust FT-817 in its place would be a good way to proceed.


Comment from Hajo
Time 6/24/2013 at 12:54 pm

Last night I had the same problem on 30m: No signals, and not beeing heard with my QRO signal of 200 mW. The reason became clear when I looked at the RBN-Network: conditions at least on my side were down. So have a look on the bright side …

72 de Hajo DL1SDZ

Comment from Mark VandeWettering
Time 6/24/2013 at 10:57 pm

My problems turned out to be a chunk of coax. Replaced it, all is better now.