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Re: An Important Post.
From: Malcolm Watts[SMTP:MALCOLM-at-directorate.wnp.ac.nz]
Sent: Wednesday, August 06, 1997 4:34 PM
To: tesla-at-pupman-dot-com
Subject: Re: An Important Post.
Hi all,
After reading RWW's post, I decided to double-check the
integrity of the experiment I have done.....
1.6mH 800uH 400uH 200uH 100uH 50uH 25uH
----oooo--+--oooo--+--oooo--+--oooo--+--oooo--+--oooo--+--oooo--+---
In | | | | | | | Out
--- --- --- --- --- --- ---
--- --- --- --- --- --- ---
Gnd | | | | | | |
----------+--------+--------+--------+--------+--------+--------+---
10pF 22pF 50pF 100pF 220pF 470pF 1000pF
I hooked the scope probe across the "In" end of the line in series
with a 10pF capacitor (giving 5pF total across that end) and hooked
the signal generator across the "Out" end to give the opposite
grading.
Result: Fr measured = ??? I got two strong resonances and a plethora
of small ones either side. Not a good representation of a
high Q resonator! Strongest responses were 593kHz and 807kHz :( Not
much agreement between the lumped calcs and the measurement either.
Conclusion: the graded structure with the grading of heavy L at the
bottom and heavy C at the top is the best model I've yet seen of the
secondary.
There is however an alternative model with a similar *type* of
grading that might also work. Any guesses out there? :) (hint:
replace L's with C's and vice versa).
Malcolm