Light aircraft switched over to 24 volt electrical systems sometime in the
mid 1970s. You can sell that thing for a pretty penny to an avionics repair
shop and get what you wanted in the first place.

If there is a small civilian airport near you, inquire about where they get
their radios fixed and take a trip to the one that seems most viable.

Jim



wrote in message
oups.com...
Hi all,

Just bought this power supply and it turns out to be 24V as opposed to
12 as I'd hoped. It's a heafty beast and should be good for running my
HF mobile if I can drop the voltage down to 13.8 whilst retaining about
20 amps for the rig's TX current draw. I know I can buy a commercial
dropper, but that'd be cheating, so can anyone suggest how I might
acheive such a device through HB-ing? Which active devices would be
best for this purpose? I'd like over-voltage protection built-into any
design put forward if possible. Any pointers, please.

Thanks!