It followed me home... Philco roundie

[yagosaga]

Originally Posted by RetroHacker

Well, I got the schematics and did some voltage checks. These are all measured from chassis ground:

Screens:
Pin 3 (Red) - 435v
Pin 7 (Green) - 433v
Pin 11 (Blue) - 435v

Grids:
Pin 2 (Red) - 72v
Pin 6 (Green) - 87v
Pin 12 (Blue) - 80v

Plates:
Pin 4 (Red) - 182v
Pin 5 (Green) - 191v
Pin 13 (Blue) - 181v

So... I'm getting voltage into the tube. All three filaments light. Why no green?

I believe that you measured positive voltages, yes?

These voltages are OK. It seems that the green gun is weak. Try the following: turn the screen voltages for red and blue as low as possible with the screen controls. So you probably will get something around +300v. Increase the green screen voltage up to 700 or 800 volts. The screen should be green now. Does it?

If it is so, I will explain you the next step.

- Eckhard