[Elecraft] re: K2 anomaly

[Vic K2VCO]

Ron D'Eau Claire wrote:

> In general the audio pots on  the K2 don't have a noise problem Dave. The
> original design of the K2 audio gain circuit put demands on the audio pots
> they weren't designed for which gave the impression that the pots were going
> bad in early K2's. Wayne redesigned the circuit and I haven't heard about
> any problems with noisy controls since. 

I have to differ.  The pots DO get noisy over time; it's just that the 
original audio pot circuit was especially sensitive to the slightest bit 
of noise.

I didn't make the audio mod for some time because I didn't have the 
problem.  After a while I started to have it, so I made the mod.  Now 
the noise is greatly reduced, but there's still a trace.  I will get 
around to replacing the pot at some point.

My RIT control got quite squirrely after a while, and I replaced it. 
Now it's fine.  The new pot I got from Elecraft seemed more substantial 
(the shaft appears to wobble less) and they may be using better pots now 
than in my K2 no. 709.

-- 
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco