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cardboard tubing


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From:  Cabbott Sanders [SMTP:cabbott-at-cyberis-dot-net]
Sent:  Saturday, August 22, 1998 8:33 PM
To:  Tesla List
Subject:  cardboard tubing

I am aware of the losses of using cardboard tubing in my design...  However, I have
failed to find suitable PP tubes (or any other for that matter) in the tremendous
diameters which i need. Im talking about 24" wide and 18" wide, here.

Tesla List wrote:

> ----------
> From:  RWB355-at-aol-dot-com [SMTP:RWB355-at-aol-dot-com]
> Sent:  Saturday, August 22, 1998 12:41 PM
> To:  tesla-at-pupman-dot-com
> Subject:  Re: Hi All
>
> Hi Cabbott,
>
> You donīt happen to some extra cash for us poorer coilers out there? Just
>  kidding.
>
> I havenīt done any maggy work (yet). But here are my two cents to it:
>
> Forget the cardboard!!!!. The wall thickness is way to large and carboard is
>  lossy. Next problem if your secondary ever has internal arcing you can trash a
>  cardboarded one right away. Small coils (under 800 Watts input) can get away
>  with cardboard, but not yours!! You wouldnīt build a very successful coil with
>  it. If money is no object, try using plexiglas or lexan tubing. Your next bet
>  would be PP (itīs just as good, wonīt shatter like plexi and its cheaper !!)
> PP doesnīt really absorb moisture, but to remove surface moisture throw it in
>  an oven and bake at a mod. temp (50-60°C i.e 120-140°F) for 30 min and then
>  coat it with a good anticorona paint. The only prob with PP is the paint will
>  stick to it but it doesnīt "connect" with the PP. Itīs insoluable in just
>  about anything. This means you canīt "bang it around" like a coated PVC coil.
>  The paint might split off, soyou have to be careful here.
>  Your wire should work okay. Although I canīt see any real advantage in using
>  square wire on a Tesla. Iīm not so sure about the mylar insulation, tho. Mylar
>  isnīt any good in a TC cap, so Iīm not sure here. Letīs see what other coilers
>  think.
> Have a look at Bert Poolīs site. He has a good info text on magnifiers. Also
>  read RQīs texts on the list. Several of his sugestions should work on your
>  maggy, too.
>
> Now my question to you: Do you have your maggy literature handy (read:
>  sendable via email). If so it would interest ME and probably some other
>  coilers out there, too.
> Keep us posted.
>
> coiler greets from germany,
> Reinhard



--
Cabbott Sanders
Salem Oregon
Website: http://members.aol-dot-com/cabbotttt
Phone 503-390-8992
Cel   503-930-9173