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Registered Member #2919
Joined: Fri Jun 11 2010, 06:30PM
Location: Cambridge, MA
Posts: 652
What transformers do you have access to? I think flybacks provide too much voltage, and you're not going to be able to make a mains voltage multiplier that can provide that much current easily.
Registered Member #1412
Joined: Thu Mar 27 2008, 04:07PM
Location: Taipei Taiwan
Posts: 278
bwang wrote ...
What transformers do you have access to? I think flybacks provide too much voltage, and you're not going to be able to make a mains voltage multiplier that can provide that much current easily.
I can find various kinds of ferrite core and bobbin and I have access to coil winding machines.So I can wind any ferrite core transformer.
Registered Member #543
Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
You must first choose the thermionic valve you are going to use, and only then can you work out what power supply will be needed.
No TV or monitor-type LOPT ('flyback') will be suitable for supplying popular VTTC designs using power valves like 811.
An alternative to MOTs is to use actual valve PSU transformers but these are usually expensive, not always easy to find, and are costly to transport because of their weight. Parmeko oil-filled transformers are the gold standard against which the quality of all other transformers may be measured.
Registered Member #333
Joined: Mon Mar 20 2006, 06:02PM
Location: Czech Republic
Posts: 45
You can build cascade voltage multiplier utilizing some line filter elyt. caps from old CRT monitor/TV - e.g. 100uF/400V. I belive you can get about 1kV with reasonable current for VTTC. But I can't belive you cannot find any MOT, try to find some local rubbish collecting and recycling yard...
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VTTC power supply substitution?
