[Elecraft] K3 audio artifacts

[David Cutter]

Does it go away if you switch in some RF attenuation?

David
G3UNA


----- Original Message ----- 
From: "Vic Rosenthal 4X6GP/K2VCO" <k2vco.vic at gmail.com>
To: "Elecraft Reflector" <elecraft at mailman.qth.net>
Sent: Tuesday, November 18, 2014 12:27 PM
Subject: [Elecraft] K3 audio artifacts


>I know I might be beating a dead horse, but my recent experience in big, 
> noisy pileups has made this problem stand out.
> 
> The t/r transitions in QSK and semi-QSK CW when there are nearby strong 
> signals make a horrible racket -- enough to make me turn down the volume 
> when sending, which negates the utility of QSK, of course.
> 
> Although the QSK is smooth and quiet on a quiet band, this is not the 
> case when there are strong signals around. Here in 4X the EU signals can 
> be super-strong, and in recent FT4TA pileups, the banging and crashing 
> around my sidetone made operating sheer torture.
> 
> Yes, I am using QRQ mode (I listen to the DX on the subrx and the pileup 
> on the main so as to make this possible) and New QSK. It doesn't matter.
> 
> The problem is as bad or worse in 'simplex' operation when numerous 
> stations are calling a DX station on the same frequency.
> 
> I understand that this is caused by the limitations of the synthesizers. 
> But I have discussed with Wayne and Lyle the possibility of changing the 
> RX muting function, which would slow down the QSK but at least make it 
> quiet. Fast QSK is worthless if I have to turn down the audio to protect 
> my eardrums!
> 
> This would do a huge amount to increase the operating pleasure of 
> serious CW operators. The feature could be optional so those who like to 
> ragchew at high speed in QRM-free spots could turn it off.
> -- 
> 73,
> Vic, 4X6GP/K2VCO
> Rehovot, Israel
> http://www.qsl.net/k2vco/