[ARC5] Receiver Voltages.

[WA5CAB--- via ARC5]

All five sets have the same gain control circuit.  And in fact, all five 
sets have the same AGC line.  But it is connected to the 2nd diode in the 
12SR7 only in AN.ARC-5.  In the other four models, that diode is grounded and 
nothing is connected to the AGC line.  And the two .05 ufd and three 1/2 meg 
of the decoupling network are not present.

In a message dated 04/30/2015 10:12:16 AM Central Daylight Time, 
> >I understand that the ARC-5 receivers had AVC, while the ARA and
> >SCR-274-N receivers had manually controlled gain. The screen currents
> >of the controlled tubes therefore vary with gain setting.
> 

Robert Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480