Don
I probably should have been more specific but this effect in the fast agc
position was not just a transitional effect. If I injected a steady
carrier into the radio from a sig gen and listened with agc set to medium
or slow, the carrier sounded a nice clean T9 but if I switched to fast it
adopted a very raspy quality. At that point I used my scope to
discover the recovered audio was modulated 50% by a 150 Hz waveform which
was sawtooth in character. I then scoped the AGC 1 & 2 lines and found
sure enough the 150 Hz sawtooth waveform was there. For what ever reason,
when set to fast, the agc system was up and oscillating away happily.
Post fix, the fast position is still uncomfortable to listen to for both CW
and SSB but it no longer has the 150 Hz overlay.
73
Bob, 5B4AGN, P3F
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- Re: [drakelist] R4C agc problem Bob Henderson
- Re: [drakelist] R4C agc problem Bob Henderson
- RE: [drakelist] R4C agc problem Gerry
- Re: [drakelist] R4C agc problem Bob Henderson