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Re: PVC Pipe - Plastic Wrap Coating

Original poster: Terry Fritz <teslalist@xxxxxxxxxxxxxxxxxxxxxxx>

Hi Karl,

At 03:58 PM 3/12/2005, you wrote:
Hi Terry,

Your plastic stretch wrap is a novel idea, but what about aesthetics?

They only seem to care about how pretty the "sparks" are :o))

Do you do presentations with the wrap on, or do you have a nice shiny poly-coated secondary ready for those.

I avoid the expensive pretty spun aluminum top loads too since when traveling things get beat up pretty bad. The coils are what they are with plastic wrap and dryer duct ;-)) I think all my coils (even the pretty coated ones) now sport plastic wrap... Once in a while someone is "under impressed" with a coil so I always bring along a copper pipe for "them" to "touch" the sparks with >:o)))

Also, I noticed that you terminated the upper winding of your secondary with a bolt and then a larger gauge wire for attachment to the toroid. Does this arrangement promote corona, or secondary breakout? I have had coils (probably badly tuned or overpowered) where breakout has occurred just about where your bolt is.

I have not had a problem with it but his particular coil has a corona ring:


The top load mount was from another coil that already had the ring... Bolts do like to spray corona though if there is not a corona ring. I also make my coils "tall" so winding to winding voltage is not high.




On Mar 12, 2005, at 5:45 PM, Tesla list wrote:

Original poster: Terry Fritz <teslalist@xxxxxxxxxxxxxxxxxxxxxxx>

Hi Dave,

I don't "paint" my coils anymore either ;-) I do wind them "tight" so minor temp/humidity variations do not cause the windings to go loose and fall. But for protection, I wrap them good with shipping stretch wrap. All office supply stores have it. It is like Saran wrap but heavier. It protect the coil from physical damage very well and if it arcs up or gets damaged, you can easily pull it off and replace it!!
Here is my new little DRSSTC coil.