Re: Best Sec. form material

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

Original poster: "Terry Fritz" <teslalist-at-qwest-dot-net>

Hi,

Josh has a good point!  If you use sonotube, spray it with canned poly at 
least to hold the windings.  Also, ~#24 wire should be wound with about 
three pounds of "pull" on the wire to be sure it goes on smooth and tight.

I have had white PVC forms shrink with time, temperature, and humidity 
too.  I bumped one once and the wire "fell" in a mess...  Just a light coat 
of poly will hold the wire and prevent a disaster.

The #28 wire on my 10 inch OLTC sonotube form is not sprayed, but it is 
held with poly stretch wrap.  However, the real key is the wire is wound 
very tight!  Not too tight so it breaks, but certainly NOT loose ;-))

Cheers,

         Terry

At 09:13 PM 7/18/2003 +0000, you wrote:
>hello
>
>
>i used a 10" sona tube. it worked like a champ till it shrunk and my sec 
>coil died. the turns overlaps.
>i do not recomend it at all ever.
>pvc is good enuff. unless you got the $$$ for an acrilic tube.
>
>good luck
>read you later
>Josh
>
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