[AMRadio] Ranger Modulation

KA5MIR ars.ka5mir at gmail.com
Thu Nov 16 21:45:00 EST 2006

On Thursday 16 November 2006 18:23, Jack Schmidling wrote:
> KEY5MIR wrote:
> >   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.
> Other than watching it get bigger and assuming that it remains
> sinusoidal, what would I look for indicated by my problem?
> js

That's pretty much it, along with what John says here...

On Thursday 16 November 2006 19:07, John E. Coleman (ARS WA5BXO) wrote:
>         Transformer saturation has a very distinctive look when low
> frequency sine waves are passed through.  One peak or the other of the
> sine wave will flatten but the flattened part will have a slope.  When a
> pre-amplifier stage is over driven the wave flattens but does not
> generally have a slope on the flattened part of the wave.  When a
> transformer has reached magnetic saturation there is a flattening as well
> but is will have a distinctive slope some have labeled it the trapezoidal
> look not to be confused with the pattern we use for modulation indicator.

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