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Re: CGA Monitor Flyback ???



Hi,

> I have been playing some weeks ago with a TV flayback for my kid's plasma
> globe. I had it fed by a TV transistor, driven by a variable oscillator,
> using only 60 VDC. I found maximum output at 8 kHz and 16 kHz.

Now, this get's maybe a bit OT from Tesla coils, but if in all those
plasma coil driver schematics and "solid state TC with TV flyback", the
flyback really runs at so low frequency, is it safe/painless at all to
touch the TV flyback driven plasma globe? I had the impression the
commercial globes operate at RF - and could be touched due to "skin
effect" i.e. nerves not responding. 

> >When you connect the flyback directly to the mains, it will
> >just act as a normal step up transformer, not like a flyback.
> You got to explain this to me: a flyback primary is less than 10 ohms and
it is
> supposed to be supplied with pulses. Connecting it to the mains (in my
opinion)
> will simply result in a stinking smoke cloud within a few seconds. Am I
wrong?

Sounds pretty ok, it'll burn up if connected directly to mains. OTOH, if
there's that variac the guy used to control the TV flyback, and if he set
power to real low (variac as voltage divider, and tapped variac part
impedance much less flyback impedance), then the flyback could have
miraculously survived. Maybe even operated somewhat well as he said.
(I don't recommend this mains to TV flyback in any way though.)

Or is there a difference between monitor and TV flybacks? Dunno...

--
*************************************************
 Jan Florian Wagner
 http://www.hut.fi/~jwagner