Re: A Difficult TC?

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

Original poster: "brian by way of Terry Fritz <twftesla-at-qwest-dot-net>" <ka1bbg1-at-mcttelecom-dot-com>

Hi, welcome to tesla stuff. for the transistor almost any flyback type npn
transistor should work. snag one out of a tv or get a used one from the tech
at a tv shop. It will usually be right near the black flyback, tv's computer
monitors,almost anything with a glass picture tube. cul brian f.
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Sunday, August 12, 2001 9:10 PM
Subject: A Difficult TC?


> Original poster: "Ron Hubbard by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<hubbard_ron-at-hotmail-dot-com>
>
> Hi, all;
>
> Has anyone built the Tesla coil found at
> http://www.pupman-dot-com/current/vladi2/ubjt.pdf? I am tempted to build it
but
> I can't cross-reference the transistor shown in the schematics and I don't
> know what to use as a substitute.
>
> And there are a couple of questions I need to ask more experienced coil
> builders. For sinstance, the part of the circuit with the diac and triac
> looks suspiciously like a common light dimmer and I was wondering if a
cheap
> lamp dimmer could be used in place of that part of the circuit?
>
> And lastly, I have a piece of  nominal 1" PVC pipe (which is really 1.25"
> around)  that's about a foot long. I also have some surplus 18 gauge
> stranded wire on hand. According to the Wintesla program, if I make a
> secondary using that wire and piece of PVC as a coil form I should get a
> resonant frequency of nearly 2 MHz with a toroid; 5 MHz if the coil is
> unloaded. I need to know if the wire being both stranded and insulated
would
> change the secondary's resonant frequency any.
>
> Ron Hubbard
>
>
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