[sdiy] Integral scope on VCO

[Tony Clark]

   Hi Thomas,

>  I'll have to experiment a bit with this, maybe implement a simple trigger
> circuit and beam blanking... It gets a bit interesting, since the CRT
> needs a 500V focus voltage and the deflection amp outputs must be
> elevated to 500V. The PSU for the whole CRT and deflection amps has to be
> at least 800V, or more like 1000V, with multiple 'taps'. It'll get tight
> in there, with transformers and HV capacitors etc.

   It's quite possible to make very tiny high voltage supplies for your 
application.  I just finished designing just such a thing for a product  
my company is making.  I was able to come up with a design that 
will generate a good 1200V DC (approximately) and fit in a 2x2x0.5 
space.  It runs on 12V at 120mA and the best part is the total parts 
cost is less than $10.00 (in quantity, probably about $15.00 for a 1-off)
   Don't know what kind of current the CRT requires, but the power supply 
will definately give you a good zap!

   Bitten more than once,

   Tony

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