01-02-2022, 11:43 AM
For the bias batteries you could try to rejuvenate them by injecting them w/distilled water. Or use watch batteries to replace them. Or depending on where they are in the circuit they may be able to be replaced w/high value a resistor.
Replace the LM317T w/a LM317K same device but in a to-3 package and has a 3amp max rating vs the 1.5 of the 317T. You'll need the insulators, paste, and a heat sink to mount it. Power transformer can be a 12v@ 2 or 3amp and a diode to match. The 1N400* are rated @ 1amp on a good day. 1N5401 is good 100v @ 3A. The rest is the same as the lower section w/o any of the hv stuff.
Replace the LM317T w/a LM317K same device but in a to-3 package and has a 3amp max rating vs the 1.5 of the 317T. You'll need the insulators, paste, and a heat sink to mount it. Power transformer can be a 12v@ 2 or 3amp and a diode to match. The 1N400* are rated @ 1amp on a good day. 1N5401 is good 100v @ 3A. The rest is the same as the lower section w/o any of the hv stuff.
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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