[Elecraft] FW: QSK THUMPS?

[Paul Christensen]

Thumps are often a symptom of RF ingress in the audio stage.  Is the thump 
effect reduced as the K3's transmit power is reduced?

Paul, W9AC


----- Original Message ----- 
From: "The Smiths" <notforchat at hotmail.com>
To: "Elecraft Reflector" <elecraft at mailman.qth.net>
Sent: Tuesday, April 27, 2010 9:45 PM
Subject: [Elecraft] FW: QSK THUMPS?


>
>
>
> I've heard this as well.  Mostly when doing QSK with the Sub Receiver on, 
> and even more so when in Diversity Mode.  I think that it has to do with 
> your Xmitted signal being heard by the receiver.  Wayne had adjusted this 
> at one time, but it seems to be an issue again.
> I find that if I turn on the NB it helps reduce it.
>
>
>
>
>
>> Date: Tue, 27 Apr 2010 17:07:06 -0700
>> From: eric.manning at engr.uvic.ca
>> To: elecraft at mailman.qth.net
>> Subject: [Elecraft] QSK THUMPS?
>>
>> When my K3 switches between T & R in full QSK mode, I hear audio thumps.
>> [The tramsmitted signal is apparently clean with no clicks; I always get
>> good signal quality reports.]
>>
>> Now, My K2 has no such thumps; you can't tell when the radio switches
>> between T & R by listening to the audio.
>> The transmitted cw sidetone sounds just like any other cw signal, with
>> no thumps or other noise.
>>
>> I would like my K3 to be the same.
>>
>> Is there anything I can do to attenuate the K3's audio thumps?
>>
>> eric
>> VA7DZ
>>
>> K3 3620 +
>> 500 W ICOM amp
>>
>>
>>
>>
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