[Elecraft] K3: LPF, bass audio, new DSP board: Stirring the pot?

[Don Rasmussen]

Nobody at Elecraft has been able to explain to me why the new DSP board I received some time ago has had such a profound affect on my K3. It was not supposed to. Mainly, in improved AGC. Also improved uniformity of Rx Gain between my K3's #272 and #2308. The DSP board upgrade has been the single biggest improvement I've seen in the K3 since getting it 2 years ago. 

I saved all my previous firmware loads and took them all the way back with the new DSP board as a test. I could not make the K3 behave the way it used to (in a less desirable manner) with any of the old firmware or DSP loads. 

If you are not an AGC focused operator (most CW guys are), or if you use headphones - you may not notice to the extent that I did. But if you are - a DSP board upgrade would be a deal at twice the cost... IMO YMMV, etc. 


[Elecraft] K3: LPF, bass audio, new DSP board: Stirring the pot?

James Sarte k2qi.nyc at gmail.com 
Tue Dec 29 08:30:47 EST 2009
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Jim,

This is the problem I've experienced, and why I think my receiver is
"noisy."  I can hear a high frequency whine or tone that only gets worse if
I adjust the receive EQ to enhance voice intelligibility.  This can
make working weak signals fatiguing.  I should probably just cough up the
money and swap out DSP boards for a new one with an LPF installed.  However,
I'm not too thrilled about the unannounced price increase from 69 to 89
dollars.  Had I known, I would have ordered one earlier.

73 de James K2QI