[Elecraft] K2 SSB Performance Improvement

[Stewart]

Very pleased the mods still work !

73
Stewart G3RXQ

On Sat, 20 Dec 2014 22:29:48 -0000, Ray Collins wrote:
> Other K2 owners may be interested in this.
>
> After getting many reports of poor quality transmit audio with my K2 (using 
the Proset K2 Heil boom microphone and headset), I carried out the modifications 
described by G3RXQ which increase the lower cut off frequency of the microphone 
circuit on the KSB2.  This involves changing C34 from 2.2uF to 1uF, C31 from 
2.2uF to 1uF and C20 from 0.33uF to 0.1uF.
>
> Now, when I listen to my transmitted signal on another receiver, the audio now 
sounds much crisper with increased high frequency content.  I have also had many 
comments on the high quality of my audio and even someone reporting "BBC 
quality" audio. Well done G3RXQ!
>
> I also spent considerable time trying to optimise the Tx BFO frequency by 
listening to my transmission on another receiver.  After many hours of careful 
BFO adjustment I finally ended up with the exact BFO frequency settings 
recommended in the KSB2 manual. Well done Elecraft!
>
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