Re: cap firing voltage scope measurements question
In a message dated 99-06-16 20:53:01 EDT, you write:
> Such a high voltage rise seems strange to me but I could belive it in an
> LTR setup with a sync gap. Of course, the scope or probe may have bad
> bandwidth characteristics or your getting noise which may be messing the
> readings up. However, I thought you were using pretty good HV probes and
> such but that would be the first place I would look for a problem... Do
> you have safety gaps? They should be firing like made at 30kV I would
I'm just using a simple resistive voltage divider type HV probe. My
reasoning here is that there should be ~no RF left from the previous
firing at the time the gap fires. I have a safety gap set at 3/4" using
roundish acorn nuts facing each other. I have to look for my chart
showing approx firing voltages for various gap spacings.
>> Does this seem normal? I would have expected the voltage to be
> > lower with the gap firing since there's less time for resonant voltage
> > build-up. In there a gap in my understanding? Or is my scope
> > reading wrong? The 30.4kV makes sense from a Joule perspective,
> > since it comes out to 840 cap watts or so, and the meter reads 1000
> > watts, which seems about right.
> > Mystery, or insanity?
> > Thanks,
> > John Freau >>
> Just a mystery at this point. Much more work to be done before the
> benefits of insanity start to simplify our investigations :-))
> Very great work you are doing there!!
> Terry >>