NEON DATA 2

To: tesla-at-poodle.pupman-dot-com
Subject: NEON DATA 2
From: Benson_Barry%PAX5-at-mr.nawcad.navy.mil
Date: Fri, 15 Nov 1996 22:53:00 -0400 (EDT)

Ed harris, All,
Here is more data:

Correction to previous post.
I remeasured the 1/2 secondary with a Fluke
and a megger and got a new value of 2.78 kohm
for the 1/2 secondary resistance. The previous
value of 3-5 Megohm is INVALID.

I remeasured the 1/2 secondary with a pm 6303
RCL meter made by Phillips and got a value of
335 pF for the 1/2 secondary self capacitance.
With a curve fit in Excel I got a capacitance of
about 480 pF.  I will therefore show the
inductance calculation with both values.
(This meter won't measure the transformer
inductance or resistance-gives capacitance only??)

RESONANT    CAPACITANCE  INDUCTANCE      INDUCTANCE
FREQUENCY   MEASURED     CALCULATED      CALCULATED
           (335pF) (480pF)
Hz          pF           Henrys          Henrys
____________________________________________________
2700       91.5         8.14            0.71
500        451          128.91         19.30
436        585          144.83         24.74
342        1000         162.22         37.34
238        1920         198.22         66.54
195        2960         202.17         85.84
170        3810         211.45         101.80
145        5680         200.29         114.96
114        8500         220.61         146.55
107        9300         229.63         156.91
____________________________________________________
In pspice with R = 2.78 k, L = 200 H, C = 335 pF the resonant
frequency was found to be around 600 Hz.  I tried to verify this
but got a very broad "peak" between 430 Hz and 650 Hz with
the scope connected across the transformer 1/2 secondary
and the signal generator injecting the signal into the secondary
via a 1 kohm resistor.

These things are nebulous to measure at low power levels.
Barry