G8GAR 20m Spurii on Tx

1 post / 0 new
g3jkf's picture
Last seen: 34 sec ago
Joined: 2009/01/08 - 10:34
G8GAR 20m Spurii on Tx
Image icon Spuriii on WSPRlite Tx469.05 KB
Image icon G8GAR WSPR Xmissions.PNG469.05 KB

I'm trying to advise Henry G8GAR of a problem with his WSPRlite transmission on 20m on 30th Sept.
I cannot find an email address for him. He is a new WSPRnet member.
His signal has at least two spurii at +/- 100Hz from the main transmission.
The spurii are only 8 to 11dB down on his prime signal as monitored here in Seaford, Sussex.

It appears probable that the 5V PSU he is using on the WSPRlite Classic Tx is undervoltage and unregulated. with 100Hz ripple.