[Elecraft] Sidetone

Marteinn Sverrisson tf3ma at raunvis.hi.is
Tue Jan 2 15:05:13 EST 2007


Regaring the clicks.

-----Original Message-----
I am hesitant to put this question up here because I have seen so many 
posts about it but here goes anyway.  I love my K2 sn 05834 except for 
one thing...the sidetone.  There seems to be excessive thumps (clicks?) 
on both make and break, especially when using the internal speaker.  I 
know there were alot of comments about the sine wave improvements, but 
has anyone been able to eleiminate or reduce significantly the thumps? 

Do the clicks disappear when the RF-gain is turned down?

If so the clicks have nothing to do with the sidetone, but rather
the muting circuit. This is my experience after the (tf3ma) sidetone mod.

The muting circuit is cutting of the audio noise/signal abruptly creating
the clicks, solution would be to "smoothing" the turn off/on of
the muting fets (RC filter in the gate circuit).

just my $0.02

73 and happy new year
Matti

-- 
   Marteinn Sverrisson    TF3MA
          Langitangi 2    Internet: tf3ma [at] raunvis [dot] hi [dot] is
        270 Mosfellsbær   http://www.raunvis.hi.is/~tf3ma
               Iceland


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