In message <[EMAIL PROTECTED]>, Charles
<[EMAIL PROTECTED]> writes
I built K2 Nr 413 and made lots of CW contacts, the built in Mojo was great.
I stopped using it because the crystal oscillator in the side tone was
not a pure sine wave and it became offensive to my ear. I only use CW.
I have been informed by a K2 op that the more recent versions have a
better side tone.
That is correct, Charles. There was a mod by WJ4P, called the "Sinewave
Sidetone Mod" which involved fitting a 47K resistor in series with C24
(0.0027uF) on the control board and soldering a 39mH choke across pins 7
& 10 of RP5. Ensure that C33 is a 2.2uF. If not, replace it.
There is a document around about the mod somewhere and I am trying to
locate it. If I find it I will e-mail it to you.
The later Revision B K2 has a sinewave mod incorporated.
73 de David G4DMP
_______________________________________________
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com
