3fp7 2nd anode

[dtvmcdonald]

Simple: yes. Easy: yes. Expensive or lucky: Your Choice. Heavy: usually.

The lucky part: find an old TV, radio, or guitar amp power transformer. These usually
are for 350 to 400 volt B+, full wave (CT). Thus using the whole B+ winding will
get you 700 - 800 volts under heavy load. A voltage tripler will get you the desired 2 kV.


With these transfoprmers, to drive a CRT even quintuplers work fine. But they are
still fatal if used as electric chair supplies.

[timmy]

Originally Posted by dtvmcdonald

Simple: yes. Easy: yes. Expensive or lucky: Your Choice. Heavy: usually.

The lucky part: find an old TV, radio, or guitar amp power transformer. These usually
are for 350 to 400 volt B+, full wave (CT). Thus using the whole B+ winding will
get you 700 - 800 volts under heavy load. A voltage tripler will get you the desired 2 kV.


With these transfoprmers, to drive a CRT even quintuplers work fine. But they are
still fatal if used as electric chair supplies.

So using 350-400v I assume ac not rectified this voltage into a tripler ?

[dtvmcdonald]

Originally Posted by timmy

So using 350-400v I assume ac not rectified this voltage into a tripler ?

That's correct ... AC goes into the tripler. As another person mentioned, potted
triplers for horizontal frequency will not work. You need film caps and 2 kV or more diodes.

Oh yes! IF you look hard you can find used HEathkit scopes and modulation monitors that will
have the necessary stuff in them. These may or may not be cheap.

[timmy]

Originally Posted by dtvmcdonald

That's correct ... AC goes into the tripler. As another person mentioned, potted
triplers for horizontal frequency will not work. You need film caps and 2 kV or more diodes.

Oh yes! IF you look hard you can find used HEathkit scopes and modulation monitors that will
have the necessary stuff in them. These may or may not be cheap.

I do have a hv generator that produces 2k and this would probably work well. This is for a 3fp7 tube that I may attempt to fit in a pilot tv it would be better then a green tube. And it just has to have 2k present for the tube to light bright there wouldn’t be any draw. But the hv generator works on 3.7v dc so how to get that voltage from a pilot to run this would be interesting.