Now that the engine is running well, I have a new problem.  Alternator
noise.  The intercom is the main problem (victim).  When the intercom the
alternator noise is quite noticeable, even annoying.  The noise goes away
altogether when the intercom is off (i.e., when using the radio without the
intercom/audio panel).  If I turn off the alternator the noise mostly goes
away, (I think the coils make a faint noise - but it is not significant.)

The intercom/audio panel is the kit from RST.

I was going to try an automotive filter on the power to the intercom.  Any
other thoughts/suggestions?

Thanks,
Dave Leonard