Hello Jack, I doubt you could hear much difference between 55 and 90ma resting current. The tradeoffs are less linearity (raspy audio) if the resting current is too low and more dissipation (heat) generated by the modulators if it's too high. That's almost certainly not your problem.
Connecting your audio generator to the mic input and tracing the sine wave through your audio stages with an Oscilloscope can be fun and educational if you like that kind of stuff. That might help you zero in on the problem. 73', KA5MIR > ... > Now I notice another discrepancy..... the manual that came > with it says to adjust the mod current to 75-90 ma. > The manual that Rick sent me for the new version which > I seem to have says 55-70 and no clue why the difference. > I presume that was a typo. Does anyone challenge this? > What is the effect of different modulator current values. > Changing it risks breaking the wire on that resistor... > which BTW, Rick sent to me as a gift. > ... > js ______________________________________________________________ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net
