[ARC5] Powering an ARC-5 Receiver After Long Storage

[Kenneth G. Gordon]

On 21 May 2014 at 7:56, J. Forster wrote:

> > In my experience, the few electrolytic caps in the receivers are not
> > always bad, and when they are, nothing much bad happens.
> 
> If a bad electrolytic shorts out a cathode resistor, the tube bias is
> altered, possibly blowing an output transformer. This happens in other
> sets.

There are, at most, three electrolytic capacitors in the receiver: 1) the 15 mfd 
cathode bypass for the 12A6 audio output stage, 2) a 3 mfd capacitor across 
the RF gain control. I presume this is a simple buffer in case a control is 
scratchy, and 3) a 5 mfd additional screen filter capacitor, C-32.

C-32 would cause problems if it shorted, but I have yet to find one in that 
condition. Usually it is open.

All others are paper.

Ken W7EKB