Newbie's First Questions RCA TS 721 Restoration

[Yamamaya42]

Originally Posted by Chris K

So looking at the Riders and the audio output 6K6, I'm looking at 6.3 AC on pins 8, 7 and 2, -14 volts DC on pin 5, 185 volts DC on pin 3 and 200 volts DC on pin 4? Do you concur?

pins 8 & 7 are tied to gnd so they are 0v , pin 2 is heater at 6.3v AC, pin 4 (ctrol grid) is tied to bias & the red wire of the output via 1k resistor to +225, should be about 200v, pin 3 is hooked to pin 3, plate and will be lower because of the 500 ohms of the output @ 185v, or so they say.
pin 5 is pulled negative via 470k

[Chris K]

Originally Posted by Yamamaya42

pins 8 & 7 are tied to gnd so they are 0v , pin 2 is heater at 6.3v AC, pin 4 (ctrol grid) is tied to bias & the red wire of the output via 1k resistor to +225, should be about 200v, pin 3 is hooked to pin 3, plate and will be lower because of the 500 ohms of the output @ 185v, or so they say.
pin 5 is pulled negative via 470k

Learning so much here...thank you very much. I'll get to work!

[old_coot88]

Originally Posted by Yamamaya42

pins 8 & 7 are tied to gnd so they are 0v , pin 2 is heater at 6.3v AC, pin 4 (ctrol grid) is tied to bias...

Um.. small nit, but pin 4 is screen grid, pin 5 is control (signal) grid.