[harley92]

Here is a suggestion for these radios that use non-polarized caps and there is the possibility of reversing the battery leads. It may be a tight squeeze in some of these sets, but install a full-wave bridge rectifier in the set so no matter which way the battery is connected, positive goes to the vibrator p/s and negative goes to ground. Just make sure to use one of high enough amp rating. You may have to install a second on for the filament string. Not sure the radio would work correctly with the B+ to the filaments being reversed polarity. You could also install it before the switch, byt may want to do an inline fuse in case the bridge goes bad. I ordered some non polarized caps from Justradios.com in Canada. When they arrive, I will post on the re-stuffing results.

My 37-624 restore is a challenge at every turn, but will be worth it.
Gerald D.