01-05-2024, 03:14 PM
Stick with the 1Q5 the 1A5's plate load abt 3x as high. There is also a 3Q5 which has a tap in the filament for 1.5v operation. May have to move a wire to make it work but they are a common tube. More than likely the opt when out and the shop couldn't find one that had a 25K pri. So change the tube to an 8K tube and opt problem solved.
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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