Hans Johansson wrote:
I am the happy owner of K2 #5169. It functions fb but I am
very dissatisfied with the sidetone.I have read all posts on
modifying the sidetone and done all of them but I still have'
thumps on the sidetone. It's not a big problem at slow speeds
but when I work 30 wpm or more it is very irritating. Is there
anyone who has fixed it please tell me how to do.
One thing that I noticed is that the thumps are less when you use the
headphone jack on the front panel than when you plug the phones into the
auxiliary speaker jack on the rear.
The thump is very low frequency, and I've taken to using an external
audio filter to remove it entirely. If you can find phones that have a
'communications' instead of high-fidelity frequency response this will
fix it as well.
I am on my way to give up and build a separate sidetone
oscillator ( a copy of my excellent OMNI V osc.).
My second question: Is there any point where I can find
keyed 5V (or 8V or 12V) ?
I'd just rectify a little RF and use it to gate the oscillator.
--
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco
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