10-22-2017, 05:58 PM
Hi Jeff,
You might want to measure the AC voltage from each of the small pins (plate) to the chassis w/o the 5Z3 in the socket. Voltage should be half of what you see from plate to plate + the 400 ohm tapped bias resistor. The important part is that the two voltage (from each plate to chassis) are pretty equal by a few volts. If you have a large difference then I would be thinking about a PT.
By measuring the resistance of the winding from the center to each end doesn't tell you much as one side is always longer than the other.
GL
You might want to measure the AC voltage from each of the small pins (plate) to the chassis w/o the 5Z3 in the socket. Voltage should be half of what you see from plate to plate + the 400 ohm tapped bias resistor. The important part is that the two voltage (from each plate to chassis) are pretty equal by a few volts. If you have a large difference then I would be thinking about a PT.
By measuring the resistance of the winding from the center to each end doesn't tell you much as one side is always longer than the other.
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
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