[Elecraft] [K3] K3 Rev C DSP with Low Freq Enhancement

[Paul Christensen]

> 3) At the time these capacitors were changed, *other* component changes 
> were
> made to improve the *transmit* audio low frequency response.  Several
> components were changed to improve this response for the front panel
> microphone, rear panel microphone, and line input paths.

Lyle,

As I recall, the *other* changes affect both line-in and mic-in.  On the 
N1EU website, I've documented those changes with only C value changes 
instead of R value changes.

I think what some folks are requesting is an updated schematic, showing the 
new values.  But what they may not realize is that 7 SMT capacitors are 
changed -- or in the alternative, the corresponding SMT resistors require 
solder re-work and that's in addition to the C9/C13 change and so the total 
parts change may be in excess of 10.  That's a lot of propensity for damage 
to the board and it really makes sense to just opt for the board swap 
through Elecraft.

Paul, W9AC