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Registered Member #6857
Joined: Sat Sept 22 2012, 08:25AM
Location: Srbija, Novi Sad
Posts: 40
I made a little high frequency TC that uses Armstrong oscillator and IRFP460, but the problem is, all I can get out of it are 5mm sparks because it is powered by a 18V/330mA transformer + 4x voltage multiplier. The problem is I need more amperes, and where I live components are not easy to get, and honestly they are too often too expensive for me, so I make many things from scrap. I tried attaching my 3.5A laptop cable in series and the result was much better.
Anyway, I have lots of 0.2mm enameled copper wire lying around, and few ferrite cores (one is toroidal (2.7cm outer, 1cm inner diameter), and the other one is a lot bigger, from an old flyback I burned), and some other wire.
My question is, is there any way to make a transformer with the things I listed above? Is it possible to make a transformer with those parts that would give ABOUT 10 Amperes when connected to my 220V/18V 330mA transformer, to connect it in series with my current supply?
Registered Member #162
Joined: Mon Feb 13 2006, 10:25AM
Location: United Kingdom
Posts: 3140
I do not think that you can get more continuous power but if you can get electrolytic capacitors for the 18v x4 supply output (a few 1000 uF preferably)
then you could make an interrupter for your Armstrong oscillator so that, for example, it is cycled ON for 0.1 second and OFF for 0.9 second ..repeating
(enable and disable the oscillator, e.g. a transistor that shorts the gate-to-source of the IRFP460)
this way you could have 10x the power but for 1/10th of the time in my example this would be one burst per second.
Experiment with the ON and OFF times for the best effects.
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Winding a toroidal current transformer
