"Lonnie" wrote in message
...
Even if you could get the high voltage down far enough, the HP-23
doesn't have enough current capacity for the TR-4's three final tubes.

gil wrote:

I wonder if anyone here has modified a HP-23 to be used with Drake
gear?
The high voltage on the HP-23 runs about 800 volts and in the Drake
AC-4 at 650 volts, Im sure the other voltages differ from one to the
other as well.
Would like to know if there is a way to mod the PS.

Any input appreciated

Thanks for reading, Gil n2wjw

Good point, I forgot there were 3 of them.

Back in the day of cheap mil surplus, we would cobble up all kinds of stuff
and often add transformers and parts hanging in mid air to existing chassis
cobbled together to get what we needed. Harder to find tube junk these
days, but garage sales and one swap meet run will usually turn up enough
junk to build something.

Never let anything keep you off the air. I have fond memories of every
radio that I ever cobbled on the air. At one point I had an OLD GE Pre-Prog
250w 2m base station and 440 pre-prog and A- strip Motorolas in racks and
TCS boatanchor twins (from WW2 landing craft) on 40 and 80 meters CW.
Shelves of tube type audio gear, real to real. Rebuilt TV (no cabinet of
course) all in my bedroom as a kid. Not real efficient but lots of fun. I
wasn't paying the power bill so that issue never came up. I even modded an
SCR-522 (VHF radio from ww2 fighter planes) for 2m AM with a Variable Local
Oscillator and would slope detect local 2m FM repeaters before I could
afford a scanner. Most junk was free from dumpsters or local hams,
relatives with way too much junk in their garage. My folks were very
patient with my hobbies and at one point I had entirely taken over my room
and the 2 car garage with projects that were cheaply doable but barely time
for half of them. My Mom's dad had done the same thing, so she actually
encouraged it.