[ARC5] Running receivers at low B Voltage

[kgordon2006 at frontier.com]

On 7 Sep 2025 at 12:43, Matt P wrote:

> 
> Ken, 
> 
> Howdy! I picked up a simple 60 VDC supply with an R-19 receiver and it works just fine. 
> I got a NIB receiver that ran great with the 60 Volts, but then made the mistake of 
> putting dynamotor on it.

Yes. The caps fail rather quickly, don't they? I had a receiver that I first fired up on an AC 
supply: within a few minutes, one of the .22 MFD caps shored out.

Since none of my receivers are "museum quality", in fact most of those I have have been 
hacked to crap, I simply replace the caps with 0.47 MFD 400 VDC metalized-film caps.

I have a page on my website showing my method of restuffing the can-caps, but usually don't 
bother with that any more.

https://www.w7ekb.com/glowbugs/Military/PDF%20files/ARC5/Restuffing.html


> 
> When I need more audio output, I just plug in an amplifier speaker.

Yes, Matt. I have a couple of those small battery-powered mini-amplified speakers that Radio 
Shack used to sell. I use one of them with my low-voltage powered ARC-5s and my 
AN/GRC-109 receiver too. I think one can still find those on eBay at times for relatively 
cheap.

I learned about those from Dave Stinson.

They work just fine!

Ken W7EKB