10-14-2024, 11:26 AM
It seems like 1/2 of your opt's primary is open, from the center tap to one end. Roughly the total from end to end should be about 500 ohms and center tap to each end roughly 250 ohms. If you are reading 1000's of ohms from the tap to one end it's toast (open). Same w/the fc. If it reads 10's of K it's open (copper rot) and done for.
The only speakers that I can think of off the top of my head are the early "pie pan" speakers K1-3. These have the high resistance fc but the opt isn't going to work out unless you get one from a model 90B 3rd gen p/p 47's. All the others are setup for p/p triode, load resistance too low or single 47 tubes, no tap.
The only speakers that I can think of off the top of my head are the early "pie pan" speakers K1-3. These have the high resistance fc but the opt isn't going to work out unless you get one from a model 90B 3rd gen p/p 47's. All the others are setup for p/p triode, load resistance too low or single 47 tubes, no tap.
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got it!
Terry
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