Re: CGA Monitor Flyback ???

• To: tesla-at-pupman-dot-com
• Subject: Re: CGA Monitor Flyback ???
• From: "Mike Harrison" <wwl-at-netcomuk.co.uk> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
• Date: Tue, 22 Feb 2000 11:56:52 -0700
• Approved: twftesla-at-uswest-dot-net
• Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

On Mon, 21 Feb 2000 12:58:40 -0700, you wrote:

>Original Poster: "William Parn" <parn-at-fgm-dot-com> 
>
>
>Greets,
>
>I decided to try hooking up the guts of a CGA monitor to my
>TC last night just to see how it performs.  It worked
>better than my 9kv-at-30ma NST.  I was able to open the spark
>gap up to about twice as wide.  Longer sparks and all too.
How long?

>So now I am curious, Do you think this flyback is going
>through a diode turning it into DC.  The bang rate was
>very steady, but it definately did not sound like it
>was doing 120bps, it sounded a lot slower than that.
>Also do these types of flybacks beat at 60 hertz or do
>they put out a higher freq?  I hear a lot of cool sounds
>when I start powering up the variac.
>
Yes - it will be running in DC mode. The reactance of the TC cap would
be too low for it to run at the typical 15+KHz frequency of a flyback
output
If you are grossly overloading the flyback (probably!), there may be a
60 or 120Hz mains component in the output, and there may also be a low
frequency component caused by overcurrent protection in the monitor's
PSU 
>Does anybody have a guestimate on the voltage and 
>amperage on these devices?
Depoends on screen size - 15-25KV is typical, but output current will
be very low. 

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