[Radioroslyn]

Sorry I forgot about the bottom part of your post

A- Black   (goes to chassis)  - 4 to -6 vdc @ 1.5A (each tube uses 250ma )

B+ power Blue   (goes to speaker)   +90 to 180vdc
B+90 Brown  +90vdc (HV for the RF stages)
B+ Det  Yellow  +22vdc  the minis side connects to chassis
C-         Grey  depends on how much hv you are using on the 71A  -18vdc
C+ Green   ( goes to Chassis)     goes to the +side of the C- battery
And one red lead which goes to one side of the heaters the heaters would this be A+?
yes +4 to 6vdc @1.5amps
Also don't see a B- ?  Connect B- to A- (the chassis)

It looks as thought I will need 3 voltages?
 Nah it's looking like 5. Now if you are cheap and clever you can run the spkr and RF stages off of the same 90v buss. Then use a resistor to drop the 90v down to 22v the det voltage

A, B, and C  How would they be connected?
and at what voltages?
See above.
Terry