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Opposed Resonator
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From: Malcolm Watts [SMTP:MALCOLM-at-directorate.wnp.ac.nz]
Sent: Monday, February 23, 1998 7:02 PM
To: Tesla List
Subject: Re: Opposed Resonator
Hi Bert,
> 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
Thank you the encouraging words. As I pointed out to Alfred S.
offlist one at least has to try an idea to get a handle on the real
world. As it is, any notion of an R-C response is totally incorrect!
I wanted to see what characteristics this might have when ued as a
distributed circuit despite its obvious lumpde characteristics. That
7MHz was with an equiv. 14pF topload. So, again, thank you. I will
fire it before ripping it apart. We may learn something new, we may
not.
Best Regards,
Malcolm