[Elecraft] K2, how can I increase the transmitted audio ?

[Don Wilhelm]

Robert,

If you are not certain of the filter alignment for SSB FL1 = OP1, then 
that is the very first thing to do.  No other changes will be effective 
if the filters/BFOs are not set correctly.

If you have a low output microphone, I suggest you try changing the R14 
resistor first because that is easy to do and many have found it adequate.

A microphone preamplifier would be my second choice, mounted either 
externally or between the K2 front panel and control board (builder's 
choice).

As a good 3rd alternative, add the KI6WX Increased SSB RF Gain Mod to 
the KSB2.  If you choose this mod, be aware that with the KPA100, you 
must also make modifications to the KSB2 ALC area.  Download the 
document at Tom Hammond's website www.n0ss.net related to this mod so 
you have the documentation for both the original mod and the ALC changes.

73,
Don W3FPR

Ffive VHN wrote:
> 'allo,
>
> Here is this old chestnut again. I've looked thought the archives and found lots , too much info.
>
> In order of easiest/most efficient, what are the best mods ,
>
> Is it?
>
> 1, change the R14 1k resistor to a 10k resistor on the KSB2 board.
>
> 2, build an audio amp from the microphone.
> (can someone please point me in the right direction for an easy simple cct, tnx.)
>
> 3, re align  the filters, 
>
>
> thanks
>
> Robert F5VHN
>   
>