AE5BW's WSPR signal problem!

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n6gn
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Joined: 2010/07/27 - 01:38
AE5BW's WSPR signal problem!

I've noticed that AE5BW is being multiply spotted and by many stations. That is, many stations individually report his signal as being on multiple frequencies at the same time. Here is an example from 40m of N6GN's upload to the database:

2016-04-05 09:46 AE5BW 7.040082 -17 0 DM75gk 5 N6GN CM88ok 1574 287
2016-04-05 09:46 AE5BW 7.040074 -23 0 DM75gk 5 N6GN CM88ok 1574 287
2016-04-05 09:46 AE5BW 7.040066 -20 0 DM75gk 5 N6GN CM88ok 1574 287
2016-04-05 09:46 AE5BW 7.040049 -24 -1 DM75gk 5 N6GN CM88ok 1574 287
2016-04-05 09:46 AE5BW 7.040041 -28 0 DM75gk 5 N6GN CM88ok 1574 287
2016-04-05 09:46 AE5BW 7.040024 -27 0 DM75gk 5 N6GN CM88ok 1574 287
2016-04-05 09:46 AE5BW 7.040091 -8 0 DM75gk 5 N6GN CM88ok 1574 287
2016-04-05 09:46 AE5BW 7.040099 -4 0 DM75gk 5 N6GN CM88ok 1574 287
2016-04-05 09:46 AE5BW 7.040107 -8 0 DM75gk 5 N6GN CM88ok 1574 287
2016-04-05 09:46 AE5BW 7.040174 -27 0 DM75gk 5 N6GN CM88ok 1574 287
2016-04-05 09:46 AE5BW 7.040158 -28 1 DM75gk 5 N6GN CM88ok 1574 287
2016-04-05 09:46 AE5BW 7.040149 -24 0 DM75gk 5 N6GN CM88ok 1574 287
2016-04-05 09:46 AE5BW 7.040132 -20 0 DM75gk 5 N6GN CM88ok 1574 287
2016-04-05 09:46 AE5BW 7.040124 -23 0 DM75gk 5 N6GN CM88ok 1574 287
2016-04-05 09:46 AE5BW 7.040116 -18 1 DM75gk 5 N6GN CM88ok 1574 287

Similar reports are occurring on 30m and 20m.

Since this behavior seems to exist on his signal alone and many of us see it, I think his signal is likely very rich in sidebands rather than a problem in our receivers. It looks like it has 8 Hz FM modulation at a rather high modulation index. The first four sidebands are suppressed only about 4, 13, 19 and 26 dB. He does not seem to be experiencing the same problem on receive since he is not multiply spotting others. This would lead one to think it unique to his transmitter's WSPR tone generation, stability of some PLL or LO only being affected during transmission.

I see no contact information for him in the WSPR user database and QRZ only lists his mailing address as Santa Fe, NM.

Does anyone have a way of contacting him to let him know of this problem?

Glenn n6gn