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Re: High frequency impedance of a neon sign transformer
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To: tesla-at-grendel.objinc-dot-com
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Subject: Re: High frequency impedance of a neon sign transformer
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From: EDHARRIS-at-MPS.OHIO-STATE.EDU
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Date: Mon, 08 Apr 1996 15:59:25 -0400 (EDT)
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Hi Jim, Malcolm, all
Jim, nice table of values, but I think it
may have gotten distorted a bit in transmission.
I just wanted to add that I measured a newer Jefferson
Electric Neon 15kV 60ma and got different results.
Freq Z total
------- ---------
100 Hz 386 kohm
600 Hz* 3.8 Mohm
1kHz 1.3 Mohm
10kHz 112 kohm
100kHz 11 kohm
300kHz 3.5 kohm
* Resonant
Note the 300kHz Z is twice the size of the impedance
I measured on a differnt 15kV 60ma neon as previously
reported! I guess the contruction is somewhat different
or else the potting compount is now less lossy?
Also note that unlike the old neon, this one seems to have
a resonance point at 600Hz or so! Very interesting. But you
got 3kHz right?
Also, just to check, I tried about a decade difference in
excitation voltages. The impedance remained the same to
within about 10% for different drive voltages.
-Ed Harris