03-23-2018, 08:52 PM
General rule is that pentode output tubes 2A5, 6F6, 6K6, 6V6, 41, 42, 46, and 47 all have a reasonably close plate load impedance and can use the same output transformer. The exceptions are if they are in a triode connection (plate and screen grid connected together) this lowers the impedance. Philco higher end sets use 3 #42 tubes in which two are in a triode configuration, they are abt 5.9K vs 12K in the standard pentode configuration.
Power triodes and ac/dc style output tubes (like 25L6, 35L6,43, 50b5,50C5, and 50L6 have a some what lower load generally around 1.5-2K per tube.
Power triodes and ac/dc style output tubes (like 25L6, 35L6,43, 50b5,50C5, and 50L6 have a some what lower load generally around 1.5-2K per tube.
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!
Terry
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