04-20-2017, 08:25 PM
Both of the 58 tubes pin 3 are connected together. On the 58 mixer tube pin 3 is connected to a 25,000 ohm resistor which the other end is connected to the volume control.
Pin 6(fat pin to the right side) on the 58 is one of the heater pins, it has a 2.5v heater. All 3 of the 2.5v tubes (2-58's and the 57) heaters are connected in series so they can operate from the power transformer because it only has 6.3v heater winding. The 42 tube is connected directly across the heater winding as it has a 6.3v heater.
Crosley = Headache!!!!! They use some very odd circuits. Most of the time they draw the tube in the schematics upside down!
http://www.nostalgiaair.org/pagesbymodel...003276.pdf
Pin 6(fat pin to the right side) on the 58 is one of the heater pins, it has a 2.5v heater. All 3 of the 2.5v tubes (2-58's and the 57) heaters are connected in series so they can operate from the power transformer because it only has 6.3v heater winding. The 42 tube is connected directly across the heater winding as it has a 6.3v heater.
Crosley = Headache!!!!! They use some very odd circuits. Most of the time they draw the tube in the schematics upside down!
http://www.nostalgiaair.org/pagesbymodel...003276.pdf
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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