12-17-2017, 01:24 AM
SSSSHHHHHH! It's a secret! [Image: http://philcoradio.com/phorum/images/smi...n_razz.gif].
Total of 10K @ 5W. You should have abt a total of 150vdc. Use the two resistor to divide the total voltage down to 90v . Would work out to something 7K and 3K. The 5K pot is used to adjust the A voltage from 1.2v to abt 10v. You could use it to power an old battery set (from the 20's) with 6 tubes or less. The A supply is good for 1.5A. Should probably use some sort of a heat sink for the regulator. The LM317T is a to220 package regulator. Looks like a transistor. They are abt $1.
After looking the 1N4004 will only handle 1a so use two in parallel. Max current thru the regulator is 1.5A which is enough for 6 01a's. By contrast your Philco is abt .2a (200ma)
Total of 10K @ 5W. You should have abt a total of 150vdc. Use the two resistor to divide the total voltage down to 90v . Would work out to something 7K and 3K. The 5K pot is used to adjust the A voltage from 1.2v to abt 10v. You could use it to power an old battery set (from the 20's) with 6 tubes or less. The A supply is good for 1.5A. Should probably use some sort of a heat sink for the regulator. The LM317T is a to220 package regulator. Looks like a transistor. They are abt $1.
After looking the 1N4004 will only handle 1a so use two in parallel. Max current thru the regulator is 1.5A which is enough for 6 01a's. By contrast your Philco is abt .2a (200ma)
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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