Hello Chris and Stewart -
I carried out the mod to my K2 Revision A board way back in October
2000, following the instructions by WJ4P and still on the Elecraft web
site. I have to say that following these instructions I changed the
very raspy sidetone to a near sinewave matching my preferred sidetone
frequency of 550 Hz. I believe that Elecraft incorporated a similar mod
when they brought out the Revision B board.
http://www.elecraft.com/Apps/sinewave_sidetone_mod.htm
73
David
G4DMP/G3KEP
In a recent message, G3SJJ <[EMAIL PROTECTED]> wrote ...
Yes, I did wonder about the K2DSP. Haven't got one here, yet! The mod
certainly makes a difference though.
Keep up the CW, Stewart!
73 Chris G3SJJ
Stewart Baker wrote:
Although I am not really a CW man I spent a few hours in the recent
BERU contest. After a while I began to get a bit 'fed up' with the
raspy sidetone, and looked at the reflector achieve for a solution. I
saw that G3SJJ had recently done a mod that involved adding a small
board to hold the components.
I was almost about to go this route but found that this method of
modification would likely get in the way of the K2DSP board that sits
above it. So here is what I did.
a) I removed C33 and L1.
b) I soldered C33 (2.2uF) in the L1 position
c) I stuck L1 to the BACK of the PCB close to C33 pads with double sided tape
d) I soldered the (+) terminal of a 1uF capacitor to C33 (+) pad
e) The other leg of the 1uF is soldered to L1
f) The circuit is completed by soldering a 100 ohm from L1 to C33 ( -) pad
This way all components except the 2.2uF capacitor are now out of the
way on the back of the control PCB.
The improvement in sidetone quality achieved has been very noticeable.
73
Stewart G3RXQ
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