Re: Son of Wavetek 27XT

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "S & J Young by way of Terry Fritz <teslalist-at-qwest-dot-net>" <youngs-at-konnections-dot-net>

Dr. Res,

The lowest range on the 37XR is 4 milliHenry.  Probably not very good for
Primary measurements.  I am not familiar with the 55LCR.  I searched the
Internet for 55LCR and got nothing.

Have you tried other methods, such as exciting the primary tank circuit from
a sine or square wave source with a resistor in series, then monitoring the
waveform or signal amplitude across the resistor, and varying the generator
frequency until you get an indication of resonance?  Then accurately measure
tank cap and calculate the L for the resonant frequency.  Might give more
accurate results than direct measurement of primary L.

Or, just use generator into R & primary L in series, vary frequency until
the voltage magnitudes across L and R are the same, then calculate L based
on X sub L = R?  The other method is probably better, as it will include the
stray inductance in the actual primary wiring.
--Steve Y.

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Saturday, July 26, 2003 6:17 PM
Subject: Re: Son of Wavetek 27XT


 > Original poster: "Dr. Resonance by way of Terry Fritz
<teslalist-at-qwest-dot-net>" <resonance-at-jvlnet-dot-com>
 >
 >
 > Steve:
 >
 > How does this new 37XR unit compare in cost and performance with the 55LCR
 > model?
 >
 > Most meters such as the 27XT work fine for sec. coil inductance, primary
 > capacitance, etc.  The touchy part is the fine measurements required to
 > determine accurately the primary inductance which is often less than 30
 > microHY.
 >
 > Based on the spec's you've analyzed, which meter do you think will do the
 > best job of primary inductance measurement?
 >
 > Dr. Resonance
 >
 >
 >