06-25-2022, 06:33 PM
In some locations the electrical current was DC. You could run it off of batteries but compared to a set farm set which is designed to be battery powered it draws a lot of current. There is no switch because circuit doesn't care. The rectifier sees + voltage on the plate it just pass on thru and charges the filters. There's no hum filter but they don't care. It goes to the rest of the hv circuit it's all dc. The heaters are the series = 115v and guess what they don't care work fine on ac or dc. The polarity of the wall plug matters. If plugged in backwards it won't play, no harm no foul.
Now what does matter is that an AC/DC set will not have a power transformer, a volt doubler circuit, or a phono motor. All of these need ac to operate. There might be some rare case there are two power supplies in one chassis but this not the norm.
Now what does matter is that an AC/DC set will not have a power transformer, a volt doubler circuit, or a phono motor. All of these need ac to operate. There might be some rare case there are two power supplies in one chassis but this not the norm.
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 "[-]")
