Opposed Resonator

To: "'Tesla List'" <tesla-at-pupman-dot-com>
Subject: Opposed Resonator
From: Tesla List <tesla-at-stic-dot-net>
Date: Mon, 23 Feb 1998 16:17:06 -0600
Approved: tesla-at-stic-dot-net

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From:  Bert Pool [SMTP:bertpool-at-ticnet-dot-com]
Sent:  Sunday, February 22, 1998 11:17 PM
To:  Tesla List
Subject:  Re: Opposed Resonator

> From:  Malcolm Watts [SMTP:MALCOLM-at-directorate.wnp.ac.nz]
> Sent:  Sunday, February 22, 1998 4:36 PM
> To:  tesla-at-pupman-dot-com
> Subject:  Opposed Resonator
> 
> Hi all,
>         I wound the opposed winding over an existing resonator and 
> checked its properties. It appears to look like a straight piece of 
> wire the height of the secondary (i.e. a VHF monopole). It resonates
> at a frequency considerably higher than my function gen can get to
> (6.6mHz odd). On attaching a scope probe to the top (Ctop around 14pF 
> shunted by 10 MOhms) it looked to be approaching resonance around 
> 7MHz. I'll confirm that with the RF signal generator shortly (ran out 
> of time before work this morning). So, nothing unexpected except that 
> it is a waste of wire.
> 
> Malcolm

No, no, Malcom, not a waste of wire!  At least not this test coil.  
If further testing shows the coil to be unsuitable for Tesla coil 
use, then a waste of wire.  But a very valuable contribution to 
knowledge!  If the coil can be made to resonate at 7 mhz, how small a 
cap would it require?  What characteristics would such an operational 
coil have?  I see this as a way to drastically change the parameters 
of big coils - maybe much smaller caps and tops required.  Big coils 
tend to have massive single bolts that don't branch out like the 
sparks of smaller higher frequency coils.  Perhaps this is a way to 
have branching high freq sparks at very high power levels.  I'm very 
interested in seeing what else you find on this coil now that you've 
wound it.

Bert Pool
TCBFW
bertpool-at-ticnet-dot-com