Quote:
Originally Posted by radiotvnut
I'd replace any tubes in the FM circuit. I've actually seen them test good in a tube tester but would not function in the circuit. Otherwise, you'll have to get a schematic and a multimeter and make some voltage checks. If this set does not have a power transformer, it will probably be a hot chassis. It would be best to plug the chassis into an isolation transformer. Otherwise, use extreme caution or you could recieve a possible lethal shock.
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I am assuming that this is a hot-chassis radio, as there is no transformer. If it helps, the tube complement is as follows:
1x 6BH6
3x 6BJ6
1x 12AT7
1x 12BE6
1x 19T8
1x 50L6GT
I considered simply reversing the power plug in the outlet, but something tells me that won't do anything at all.
Pic of the radio soon.

Unlike both other 659B's I've ever seen, this one is cream/whitish, rather than dark brown. Bakelite, I think?