[Elecraft] FW: New customer message on December 14, 2018 at 02:22 AM

[Don Wilhelm]

All,

While Bill's comments are useful, I can say that the TF3MA sidetone mod 
is designed for the Rev A K2s (below SN 3000).  Those K2s SN 3000 and 
above have improvements in the sidetone waveform shaping.  If you have 
upgraded your K2 below SN 3000 with the A to B kit, then you have the 
same sidetone wave shaping as the newer K2s.

I am not familiar with the TF3MA LP audio cutoff nor the JG1XLZ KSB2 
audio quality mod, and cannot comment.

73,
Don W3FPR

On 1/6/2019 8:20 AM, Bill W4ZV wrote:
> 
> Here are a few audio mods that I've made to my K2:
> 
> 1.  TF3MA's sidetone mod.  This cleans up the sidetone to a more pure
> sinusoid, allowing better zero-beating by ear.  Without it, I found it easy
> to zero beat on a spurious product.  The improvement also does not fatigue
> my ears as much as before during extended operating.  This one is definitely
> worth doing in my opinion.
> 
> 2.  TF3MA's LF audio cutoff mod.
> 
> 3.  JG1XLZ's KSB2 audio quality mod.  (not needed for CW).
> 
> I don't have time to find links for these but you should be able to find
> them in a keyword search.  They are all free and simple to install once you
> have the parts.