[Elecraft] K2 CW sidetone
kt5x at cybermesa.com
kt5x at cybermesa.com
Fri Nov 10 09:18:05 EST 2006
First, thank you for various responses (I get the digest so I don't see
responses until next day).
Yes, my K2 is older, serial # 700. Yes, it began life as an awful tone. I
did Randy's mods, but early ones.
* It turns out that I have a 47 mh inductor, and I have ordered the now
preferred 87 mh inductor, hopefully that will help.
* I found Randy's original instructions from which I worked, and note that
it is said to distort at sidetone frequncies below 530 cycles, and indeed, I
had changed to 500 cycles, so that is part of it. It is recommended that I
change C33 to 4.7 uf to reduce or eliminate low frequency distortion.
* I also find the headfone in use has a LOT to do with how it sounds. Wide
response headofnes sound terrible. Has anyone found sensitive headfones with
more limited (not hi-fidelity) low impedance phones that do especially well
with the K2???
72, Fred kt5x / w5ya
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