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PVC tube lacquer?
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- Subject: PVC tube lacquer?
- From: "Tesla list" <tesla@xxxxxxxxxx>
- Date: Sun, 17 Apr 2005 07:09:40 -0600
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Original poster: "Wim Bosma" <wbosma@xxxxxxxxxxx>
Living in the Netherlands, I could not find a source of Glyptal for
precoating my 5" PVC tube like Dr Resonance advices. Now I plan to use a
clear alkyd lacquer or PU lacquer instead. As to the importance of this
layer, is it meant to keep moisture out or is it also for bettering the
resistance against surface (creep)sparks between ajoining windings? Dr
Resonance also advices layers of Dolph's AC-43 after winding the secondary.
I plan to apply 5 layers of PU lacquer as I did with my 3" coil, as I also
could not find a firm that sells AC43. However, I could buy Dolph's ER-41
spray. (Strange that this isolation repair spray, according to Internet
information, contains iron oxyde in its (red) mixture and is therefore
slightly ferro magnetic!). Could this be the same stuff as AC-43?
At the moment I am drying out the sanded PVC tube in a long, blanketed,
carton box with a (burning) 40 Watt TL tube underneath the PVC. As the
temperature inside is only 36 degrees Celcius, this drying out may take
weeks... Gues I must look for more heat...What if I precoat only the
outside, wire the tube and heat it by pushing AC current through the
winding?.. Then, after a two days heating I can coat the inside to seal off
the PVC... Is this a sound idea?.. (Windings coming loose..) Is all this
drying out worth my efforts?.(The TC stays sheltered inside the house).
Regards, Willem, PA0TW