10-09-2016, 01:29 PM
Took a look at the diagram and it looks to be real honey! Has robust power supply and powerful audio output stage. On a lot of the Philco sets that have their triode connected 42's they use an 80 tube for the rectifier which in a ten tube set is pushing pretty close to it's max rating. I guess it's the dollars and cent thinking of the 1930's.
Did see something that is problematic. Across the HV winding of the power transformer there are two paper caps tied back to chassis ground. Those need to get gone! They don't do anything and if or when they short the power transformer goes with them. The National Co (National Radio) after the war did the same thing with caps across the HV secondary. It's pretty common the find these set w/ a replacement power transformer. It's just like having shorted filter caps but it just burns up the power transformer and not the rectifier and field coil.
GL should be a good loud set!
Did see something that is problematic. Across the HV winding of the power transformer there are two paper caps tied back to chassis ground. Those need to get gone! They don't do anything and if or when they short the power transformer goes with them. The National Co (National Radio) after the war did the same thing with caps across the HV secondary. It's pretty common the find these set w/ a replacement power transformer. It's just like having shorted filter caps but it just burns up the power transformer and not the rectifier and field coil.
GL should be a good loud set!
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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