Mike, I think it's an audio phase-shift oscillator, so guess you would need to change some of the R-C values to get a lower freq.
Others will give better thoughts I am sure. 73 Mark N5KAE ----- Original Message ---- > From: Michael A. Kelly <[email protected]> > To: [email protected] > Sent: Tue, November 1, 2011 8:49:00 PM > Subject: [Drakelist] Side Tone Adjustment for TR4CW Possible? > > Howdy, > > I had a 12AV6 tube (V2) go soft and after replacing it the "chirpy" > audio for the side tone went away, (no chirp on the transmitted > signal, just on my end) but the new side tone pitch is higher than I > prefer. Is there an way to adjust the side tone audio to get it down > in the 700-750 Hz range? (not volume, but pitch) > > Thanks, > > Michael N4MAK > > _______________________________________________ > Drakelist mailing list > [email protected] > http://mailman.zerobeat.net/mailman/listinfo/drakelist > _______________________________________________ Drakelist mailing list [email protected] http://mailman.zerobeat.net/mailman/listinfo/drakelist
