05-28-2011, 07:07 AM
Hi and Welcome to the Phourm!
I'll mention a few of the common problems with the model 20. Open driver transformer #21,(if open must replace. Can be had without much trouble) RF coils #'s 2, 7, & 10 open primary (no biggie can be rewound by hand), Field coil #30 (if open must replace speaker. Original good ones are hard to find and $$$. Can be replaced with a modern part with some circuit changes).
Then there's all the regular stuff the resistor check/replace and cap replace. I just finished up a model 20 a month or two ago and I have a model 21 (same as the 20 just different output tubes) that I'm going to start in on soon.
Terry
I'll mention a few of the common problems with the model 20. Open driver transformer #21,(if open must replace. Can be had without much trouble) RF coils #'s 2, 7, & 10 open primary (no biggie can be rewound by hand), Field coil #30 (if open must replace speaker. Original good ones are hard to find and $$$. Can be replaced with a modern part with some circuit changes).
Then there's all the regular stuff the resistor check/replace and cap replace. I just finished up a model 20 a month or two ago and I have a model 21 (same as the 20 just different output tubes) that I'm going to start in on soon.
Terry
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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