triple decode question
Question regarding the triple decode / display of some JT9 stations.
I know this subject has been raised before. This evening I am seeing a number of stations whose signals are being decoded three times as previously discussed….. the primary signal, and two other signals about 20+dB down and 60Hz away on each side of the primary. Just around 23XX UTC there was a W5 , a WD4, and also a VE7 who showed up on 20M all with this issue….possibly more.
As I recall the prior discussion here to this issue, these multiple decodes are probably caused by the introduction of 60Hz hum on the DC power of the transmitting station…. Do I have that correct?
If so, my question is what can we do to advise the offending station of this issue?
My thought is to send a Free message during a QSO saying something like, “ U HAV 60Z HUM” or “ CK UR STA 4 HUM”.
Does this sound reasonable or am I out of line for suggesting such?