[Elecraft] K2 SSB Performance Improvement

[George Winship, NC5G]

Thanks for posting this, Ray. I also was getting those kind of reports on my
K2. I was able to get the 1uF electrolytics but was unable to find the
0.1uF. G3RXQ was quick to respond to my email and said that a 0.1uF
monolithic could be used instead. The results are great, as confirmed by
hams I talk to on a regular basis for many years.

Now, if I could only get the circuit between my ears to work so that I could
tell that I had not put my K2 in split mode while trying to work K1N a
little while ago, all would be good. The "frequency police" were not bashful
in letting me know the error of my ways.

Thanks again.

73, 
George NC5G


>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.






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