on 11/4/99 02:51, G0MJW at mike@g0mjw.freeserve.co.uk wrote:
> No, because it will wreck the regulation. Most amp PSUs use capacative
> filters after the rectifier to provide the HV supply. A feature of
> capacative filtering is the high ratio of the peak current supplied from the
> rectifier into the filter capacitor with respect to the mean current
> supplied to the amplifier. The proper thing to use on the HV primary is a
> variac.
Oh! Duh! Wake up and smell the coffee, Jon...... :-)
My mistake in terminology. Yes, yes, yes, of course you would want to use a
variac and not a rheostat in the HV primary. And that is what I use - a
variac. In fact, I think it's a variac in the filament supply as well.
I wasn't thinking about the proper terms for my devices.
Yes, a rheostat would be VERY bad (bannanas as Rich says) in the HV primary.
73,
Jon
KE9NA
--------------------------------------------------------------------------
The Second Amendment is NOT about duck hunting!
Jon Ogden
jono@enteract.com
www.qsl.net/ke9na
"A life lived in fear is a life half lived."
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