[Milsurplus] Need DC/DC Converter Advice

[Unserviceable but Repairable]

OK, I'll chime in on this

> .....go ahead and experiment. After all, this is what ham radio is all about. 
       If you do, I hope you will share your findings with the rest of us.

I've run both a BC-1000 and an RT70 on a 12V gel cell & a ciggy lighter 35w
12VDC -> 115VAC 35W drug store blister-pack inverter.

Bridge rectify 115VAC into choke input filter fer ~90vdc B+.  Fair, say
5%, regulation between rx & tx.

4.5vdc for BC 1000 fm 5VDC wall wart seriesed w. Shottky Barrier diode

6VDC for RT70 from different wall wart(s)

Works fb but pse note - both rigs are FM.  Pix of both embodiments on 
Ray Fantini's 2006 & 2007 Dayton website.

And a closing note.  My BC-1000 was all broken.  Every 'coronet' postage-stamp
paper bad, real bad.  But the RT70 only had two bum tubes plus a tricky 
mechanical.  Basically, however, the electronics were plug 'n play & hope 
that'll bring some out of woodsheds.

One more RT70 note is the AM-65 audio amp / vibrapac kennel.  Try an LS-124 
with a 12vdc computer speaker amp module hidden inside.  U can get audio 
signal  on the power connector.

Or just paint the computer speaker.  Then with apollogies to some, 
Walter Mitty, pretend you're using 6m to take Porkchop Hill

   Marty

Note: plenty room in BC-1000A battery bucket for the stuff.  RT70
      as p/o PRC-16 used CY590 battery bucket.  Like who's seen one?
      So ran RT70 plus above life support in shopping poke.