I'm thinking of buying this Admiral

[MadMan]

Originally Posted by bandersen

Hmm. I don't see a 6BC5 in the schematic. I'm thinking it's in the tuner but that shows a 6AG5.

*scratches head* Dammit! And I already ordered a tube for it - the wrong tube, it is supposed to be a 6AG5. The vertical osc/amp tube was also wrong, a 12BH7 instead of 12AU7. According to my tube book, they're close approximations of each other, but meh. I'll just order another tube. I did put a 12AU7 in it, it didn't seem to make much difference.

[dieseljeep]

Originally Posted by MadMan

*scratches head* Dammit! And I already ordered a tube for it - the wrong tube, it is supposed to be a 6AG5. The vertical osc/amp tube was also wrong, a 12BH7 instead of 12AU7. According to my tube book, they're close approximations of each other, but meh. I'll just order another tube. I did put a 12AU7 in it, it didn't seem to make much difference.

A 6BC5 is the newer generation 6AG5. I seldom bought 6AG5's, always 6BC5's.
Way back then, I would try different variations of similar tubes, 12BH7 vs 12AU7 etc, to avoid having to troubleshoot the circuit.
That was in jobs where the set owner didn't want to spend too much money on an old set.