04-17-2019, 10:39 AM
Hi Scott and welcome,
Some of those early set w/the directly heated tubes can be a little confusing. It's also not too uncommon for the diagram not to notate + or - voltages, just voltage and not polarity. To get a better idea whether to grid is + or - measure from the filament to grid rather that the chassis. Funny thing is that RCA sez the 45's grids should be - 50-60v not 6v. >Oh, it also had sprung tuning cables. That was a joy to fix. Yes they are! [Image: https://philcoradio.com/phorum/images/sm...n_evil.gif] There was a thread abt it here a week or two ago. A lot of these early sets have open primaries on the rf coils and the audio transformers. No big deal to fix or replace.
Have had a few 87's over the yrs great players for '29 technology.
GL
Some of those early set w/the directly heated tubes can be a little confusing. It's also not too uncommon for the diagram not to notate + or - voltages, just voltage and not polarity. To get a better idea whether to grid is + or - measure from the filament to grid rather that the chassis. Funny thing is that RCA sez the 45's grids should be - 50-60v not 6v. >Oh, it also had sprung tuning cables. That was a joy to fix. Yes they are! [Image: https://philcoradio.com/phorum/images/sm...n_evil.gif] There was a thread abt it here a week or two ago. A lot of these early sets have open primaries on the rf coils and the audio transformers. No big deal to fix or replace.
Have had a few 87's over the yrs great players for '29 technology.
GL
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
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
