[Elecraft] K3 Audio Low Pass Filter

[Oliver Johns]

On 3 Jul 2009, at 13:04, Mike Scott wrote:

> I just completed an installation of the K3 audio low pass filter  
> board, the
> one Lyle put out to individuals who wanted to try it. I was busy  
> until now
> as the boards came out some time ago.
>

Can someone point me to the reflector article in which Lyle mentioned  
this mod?  I put up with a horrific noise level here.  Something like  
this might make it more bearable.  Are these boards available?

Thx and 73,

Oliver Johns
W6ODJ