[Texasrocker]

Ive built a few homebrew battery eliminators before. Seems there are some plans (schemats) avail online ( via google search) to build one similar to what AES sells. Seems radio-shack used to sell the needed transformer for about $4. Dont know if they still have it avail?
If you look closely at your broken socket, you can trace 2 of the wires back to chassis ground. Those are your radios (A- & B-) solder them in together to chassis, your done on the (-) hookup on chassis. You will need separate + leads to your battery-eliminator if you build one. You will need 1.5 volts dc for your tubes filaments string (A +), and 90v dc for (B+), and the (A&B -) will be the same connection to your radios ( A & B - neg chassis gnd) from a homebrew ac/dc pwr supply, making it a 3-point hookup instead of 4 since both the (-) ties together to the chassis gnd. If I remember correctly,a few diodes ,proper ratios simple transformer, & a few resistors can yield you a nice homebrew "regulated" DC farm radio ac to dc power supply for much less than AES sells theirs for high $$. Look online for a schematic to build your own: ( google search): "vintage radio battery eliminator" for a schematic. Good luck , the parts are cheap to build these type items!