[ARC5] Rectifier Power Unit for LM type freq meters: CQC-20104A

[Tom Bridgers]

Does anyone have a circuit diagram for the CQC-20104A rectifier power unit
for the LM type frequency meters?  This takes 120 VAC and outputs 13 volts
AC @ .6 amp, and 290 VDC @ 20 MA.  Has a nice 150 VAC meter on the front
panel.

The reason I'm asking for the circuit is there are two switches that I can't
figure out how they work:  "Comp 1" and "Comp 2".  When I switch Comp 1 up,
it appears to lower the output voltage by about 70 volts.  Comp 2 appears to
not do anything and may be broken.

Any help would be appreciated.
73's,
-tom
PS, If this posting is not appropriate for the ARC-5 list, I apologize.