Posts: 7,323
Threads: 270
Joined: Dec 2009
City: Roslyn Pa
https://www.youtube.com/watch?v=VOM5N3omefI
Imho I think if was building these batteries I'd use aa cells for the bias volts as the current is very low. 9v batteries for the hv is going to be short lived and using two D cell two supply the filament voltage is going to be very short lived. Granted he didn't have the set to try it out on (customer had it).
Ymmv
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
(This post was last modified: 06-05-2019, 12:40 PM by Radioroslyn.)
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RE: 38, 38 A, 38 B - by Radioroslyn - 06-05-2019, 12:25 PM
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