RE: The never ending saga: Ballasting

• To: tesla-at-pupman-dot-com
• Subject: RE: The never ending saga: Ballasting
• From: "David Trimmell" <davidt-at-pond-dot-net> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
• Date: Fri, 03 Mar 2000 10:48:48 -0700
• Approved: twftesla-at-uswest-dot-net
• Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

Well I guess I figard it out fer my self ;>)

I am getting some kind of primary resonance, but has worked into a great
current limiting scheme. I have found this is almost as satisfactory as a neon.

Regards,

David Trimmell

>Hello,
>
 >A few days ago I posted questions regarding ballasting and was wondering
why the voltage drop. Tonight I        >have done some experiments, as
empirical data is needed for someone who barely understands this (ME!). I
>tried a inductor in series with my PT, a 60 mA neon primary with
secondaries shorted together. I got almost >a 40 volt drop to the PT, I was
only getting 100 V into it (0-140 volt variac). Then I tried 16 uF Cap
across the >mains right after the inductor (neon primary), and hell if I
was getting 135 volts, only dropping 5 volts from the >variac supply! Now
have I truly missed the boat? Probably. But why didn't someone just mention
that I >needed to place some C across the lines to get back lost voltage? I
tried it again with another inductor and >found I could limit current to 15
amps at 135 volts, with terminals shorted on the PT, and this followed my
>calculations including DC resistive losses (as measured). Voltage drop
from impedance is something I don't >quite follow. But it does seem that a
little capacitance in the inductive current limiting scheme is called for.
I >found no indications of mains resonance, but can anyone explain how/why?
>
>Regards,
>
>David Trimmell 

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