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[TCML] Re: Dummy load for optimum cap size Experimentation

I'm well on my way with this experiment now.  I'm using a selenium photocell
feeding a low-pass filter to register the lamp intensity on a DMM.  An
interesting thing I found was that the intense light falling on the
photocell heats it up slightly, even 20" away, and this alters the voltage
output!  So I just run it for 30+ seconds and look for the peak value seen
on the far side of the low pass filter, before the heating diminishes the

I have two different 15/30 NST's, and am seeing significant differences in
their behavior.

I have only one 15/60 - a Jefferson unit.  For as long as I've been using
this NST, I've been getting atypical results compared with others using
different brand 15/60's.  I would REALLY like to compare the results of my
15/60 against a different model.

Is there anyone in Eastern Massachusetts with a non-Jefferson 15/60 NST,
with unmodified shunts, 120V input, that would be willing to lend it to me
for a day or so?   My testing is not stressful, there is no RF and the
static gap is carefully and properly set.

Please contact me off-list.

Regards, Gary Lau

On Thu, Jul 29, 2010 at 10:14 AM, Gary Lau <glau1024@xxxxxxxxx> wrote:

> I'm gathering materials and plans to perform this experiment - determining
> the cap size that will extract maximum power from an NST, at 120 and 140VAC
> input.  The power indication will be via monitoring the surface temperature
> of the halogen lamp dummy load that replaces the primary coil.  I plan to
> test a 15/60 NST, and two 15/30 NST's, all unmodified.
> <snip>
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