[Milsurplus] Re: ARC-5 Mobile

[David Stinson]

The toughest part of running the set "for real" at 12 volts is getting the
relays to pull in.  They will not operate reliably at 12 volts.  
Amalgamated Wireless Australia (AWA) modified a large batch 
of the sets for 12 volts (one of our great Australian members sent me some 
wonderful paperwork on the mods, for which I am very grateful).
I agree that it will be a lot easier to run the radios off 24 volts.
If you're going to use a power supply with 20-30 amps capacity,
you're going to need a "starter capacitor" on the power buss.
If you don't use one, the transmitter dyno is going to crowbar 
your supply if protected or zap your pass transistors if not.
You can buy two of those 1.0 or 1.5 farad, 20 volt caps 
with which the car audio fools are destroying their hearing
and put them in series across the buss.  You can get them 
through the E-place for around $30-$40 each.
73 Dave S.