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Philco 37-610 tombstone restoration
#55

So where is the 80 tube??? 
Looks like you have a 5Y4. Electrically they are the same but the pin out is different.

80 tube  5Y4 tube
pin 1 =   pin 8
pin 2 =   pin 3
pin 3 =   pin 5
pin 4 =   pin 7

Recheck resistances using these pin #'s
pin 1 of the 5Y4 has no internal connection so it must be used as a tie point or you are miscounting them. from the bottom view count clockwise top view count counter clockwise.

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


Messages In This Thread
Philco 37-610 tombstone restoration - by Jeepeto - 02-09-2018, 08:58 AM
RE: Philco 37-610 tombstone restoration - by Radioroslyn - 04-07-2018, 01:25 PM



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