02-26-2020, 07:08 AM
Hi and welcome to the Phorum,
Perhaps this will help https://philcoradio.com/library/images/schem/70a.jpg To be honest I rarely use the Philco part numbers to determine the part values I just use the under the chassis placement drawing and number. Then double check it's wiring against the schematic. The model 70 in all of it different alliterations only used a single 47 tube for it's audio output. Early and late model 70's are strikingly different electronically as the early doesn't have an avc circuit (note the dual volume control) vs the late which does and has a single control. Would get too bogged down the serial numbers.
GL on your new adventure!
Perhaps this will help https://philcoradio.com/library/images/schem/70a.jpg To be honest I rarely use the Philco part numbers to determine the part values I just use the under the chassis placement drawing and number. Then double check it's wiring against the schematic. The model 70 in all of it different alliterations only used a single 47 tube for it's audio output. Early and late model 70's are strikingly different electronically as the early doesn't have an avc circuit (note the dual volume control) vs the late which does and has a single control. Would get too bogged down the serial numbers.
GL on your new adventure!
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
