Do you have a computer hooked to your radio? Sometimes the poling will make
a noise in the receiver in sync with the poling speed. 73
Tom W7WHY
----- Original Message -----
From: "Merlin-7 KI4ILB" <merlin-7@sc.rr.com>
To: <TOWERTALK@contesting.com>
Sent: Wednesday, July 12, 2006 1:21 PM
Subject: [TowerTalk] Thumper
>I know this is not the best place to ask this but I do not want to join any
>more NG's
>
> What causes the thumping sound that you can get (I mostly hear it on 20m)
> on HF? They are about 1 secound apart and in perfect time. Last night they
> were about S7 and covered from below 14.225mhz up to about 14.300mhz.
>
> Just curious..
> Thanks
> Joe
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