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Re: Pseudo Toroid Design
From: Malcolm Watts[SMTP:MALCOLM-at-directorate.wnp.ac.nz]
Sent: Monday, November 10, 1997 2:22 PM
To: Tesla List
Subject: Re: Pseudo Toroid Design
Hi Bert, all,
> From: BertPool[SMTP:Bert.Pool-at-flash-dot-net]
> Reply To: bertpool-at-flash-dot-net
> Sent: Sunday, November 09, 1997 4:04 PM
> To: Tesla List
> Subject: Re: Pseudo Toroid Design
>
> [additional large snip]
>
> I have to take issue with the good Friar's comment that the inner
> part of the top load not being important or "useful". Without an
> inner disk, the toroid forms a perfect single turn short, which can
> absorb a huge amount of your coil's energy. The disk "shorts" out
> this single turn and prevents the toroid from acting as a short as
> seen by the coil. We found this out on the extra coil on our large
> magnifier. The resonator coil was driven with a transmission line, so
> we didn't think a solid metal disk was important. We were wrong.
> The toroid at the bottom of the coil (for field shaping) got so hot
> it melted hot glue! Richard Hull had about the same thing happen
> (Richard, correct me if my memory is wrong on this.) I always make
> sure that I have a solid metal disk in the center of all toroids now,
> regardless of size. Especially on magnifiers. The disk contributes
> little or nothing to field shaping, but it *does* play an important
> part of the toroid assembly.
>
> Smokin' them toroids in Ft. Worth,
>
> Bert Pool
> TCBFW
> bertpool-at-flash-dot-net
I think it makes a difference where it is located on the coil. I've
seen no difference between centre disk or no if the toroid is the
last one in the chain (top of the resonator). I would imagine that
anything approaching a short circuit would have a most detrimental
effect if positioned at the base because that is where the current
peaks.
What are your observations regarding the two types when
positioned at the business end of the resonator?
Regards,
Malcolm