Re: RF CT

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

Original poster: "J. B. Weazle McCreath" <weazle-at-hurontel.on.ca> 


At 07:46 AM 20/01/04 -0700, you wrote:

 >Original poster: Thomas <tom-at-pwrcom-dot-com.au>
 >
 >I had a win tonight.
 >
 >I made a current transformer, RF rectifier and meter with an attenuator pot.
 >
 >I passed the secondary earth through the CT turned the attenuator fully on
 >and powered up the coil.
 >
 >Bingo! Half scale reading exactly, I then turned the attenuator all the way
 >off and got a full scale reading!!
 >
 >Considering that the number of turns on the CT (7) and pot size (10k) were
 >only very roughly calculated this came as a nice surprise.
 >
 >Now I can do some real tuning and air gap tweaking/redesign with quantitive
 >result comparisons.
 >
 >Tom L.
 >

Hi Tom, Coilers,

I've done much the same here.  I wound my own CT on a toroid core with
about 15 turns of hookup wire for the "secondary" and passed the heavy
TC secondary ground wire through the hole just once.  I then connected
the CT "secondary" via some small coax to an R.F. demodulator based on
a circuit shown in the ARRL Handbook.  The demodulator output connects
to my VTVM which is set for measuring AC volts.

73, Weazle, VE3EAR/VE3WZL

Details of my "Hyperbaric Gap" and Tesla coil are at:
http://www.hurontel.on.ca/~weazle