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Measurement Techniques
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From: Tony Lekas [SMTP:tony-at-lekas-dot-org]
Sent: Sunday, August 16, 1998 1:46 PM
To: tesla-at-pupman-dot-com
Subject: Measurement Techniques
I am getting close to final assembly of my first coil and I am looking
for information on measuring various characteristics. I have a DMM. I
can borrow an I-Scope, a current probe, and a signal generator, but I do
not have access to a high voltage probe.
The coil will be powered by 3-4 15 Kv 30 ma NSTs. The secondary is
8.4"x40". The cap is a .0228 ufd pulse discharge cap.
I have seen bits of information on this in other posts, but I am looking
for more complete ideas on measurments. There are many things I would
like to measure but the following is an initial list in decreasing order
of importance:
-Secondary coil resonant frequency
I plan to do this with the equipment I have
-Primary current waveform
I need this to monitor gap quenching. I am using NSTs and don't
have any part of the primary grounded. How can I measure this without
damaging the O-Scope?
-Secondary current waveform
I should be able to measure this at the base of the coil with the
current probe. I may need to build a new current probe from a small
toriod and shield the leads so that I can get the O-Scope far enough
away for safety.
I have seen comments about building field probes. I am looking for
details on this. I am also looking for practicle suggestions on
triggering.
I hope to measure the secondary resonance next weekend, 8/22, and have
the coil running sometime in September.
Thanks,
Tony Lekas