[Elecraft] CW reception with 3 peaks on PX3

[Bob McGraw - K4TAX]

I suspect this is/was a MCW generated signal with a bit too much drive 
applied.   Thus over drive of any audio stage such as may occur when 
feeding the computer output or sound card output to the microphone 
input.  In this configuration it is very easy to overdrive the first 
stage, which appears before any gain adjustments.  Once this stage is 
driven into distortion the least amount, no adjustments down stream in 
the audio chain will clean up the signal.  Also excessive ALC, and in 
some radios any degree of ALC will cause the artifact,  and any amount 
of audio processing will cause the basic same effect.

73 Bob, K4TAX

On 8/7/2015 8:38 AM, Graham g3tct wrote:
> What frequency? What spacing between the peaks?
> On VHF this effect can often be seen due to aircraft scatter, ie 
> doppler shifted returns as well as the direct one.
> So lots of possible explanations.
>
> Graham
>
> On 19:59, Gerard Elijzen wrote:
>>
>>
>> I was in contact with a CW station recently and his signal had 3 
>> peaks on my PX3.
>>
>> Can anyone explain. The other station was using an ICOM 7410.
>>
>> Submitted this also on the KX3 Yahoo forum and had 1 reply. Thanks 
>> for that.
>>
>> Thought I might post it here in the hope to get an explanation. Have 
>> never seen this before and it does not happen on other CW stations.
>>
>> Gerard VK2JNG
>>
>>
>>
>>
>>
>> Gerard
>> vk2jng at iCloud dot com
>>
>>
>>
>>
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