Topband: Astron noise

[Brad Rehm]

"...Astron RS-12A power supply...The noise was very
high amplitude pulses every 16.66 ms ... especially strong on top
band.  73, Roger"
_________________

Roger,  the missing output capacitor probably has nothing to do with
this.  Missing or not, the value is too small to have any effect at
this frequency.  Also, the emissions are probably conducted back out
of the supply on the power cable.

Take a look at the MOV device across the incoming power leads and the
diode rectifiers.  Check 'em by lifting one lead on each.  16 mS is
the 60 Hz power line frequency.  Something is breaking down during one
half of the AC cycle.  Most likely one of the full-wave rectifier
diodes.

73,
Brad, KV5V