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Re: [TCML] RE: Primary coil supports
I've used wooden primary supports on my coils with a good measure of
success... Without any sort of sealent either... however, as I believe
was recently mentioned, at a high enough voltage EVERYTHING becomes
conductive.... At the voltage levels used in our primary circuits wood
will conduct a small amount of current. there is probably some inductive
losses in it too.. Plastic will essentially be lossless. All in all, I
doubt the losses from using wood would be significant - and if you
ensure that its dry and well sealed then it should perform every bit as
well as a plastic coil form.
As for MMC construction - I think the main reason that most people use
plastic rather than perf board is that it just looks nicer. And the
holes on most standard perf board may not be big enough to accept the
mmc cap leads without some help. Also, perfboard is really flimsy and
will buckle under the weight of a load of MMC caps without good
support... But there's no reason that it can't be used.
Lau, Gary wrote:
Wood has been used by some, though one would probably want to be sure that it's very dry and well sealed before use.
It's certainly possible to enamel one's primary. Yes, the freshly polished copper looks so nice initially and will always tarnish with age if left uncoated. But that would make it impossible to change the tap position in the future, so that's typically not done.
Perf board is commonly used for MMC construction. Just be sure that it's not the type with conductive etch rings at each hole. Even if every hole is isolated, the presence of the etch circles reduces the insulating value.
Regards, Gary Lau
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
Behalf Of Stephen J. Hobley
Sent: Tuesday, March 25, 2008 10:28 AM
To: Tesla Coil Mailing List
Subject: [TCML] Primary coil supports
Is wood a bad choice for primary coil supports?
I see a lot of plastic being used, but I seem to be able to work more cleanly in
Also can I enamel the primary coil?
Wood and shiny copper has a nice 'Edwardian' feel to it...
Furthermore - when building an MMC - is perf board OK to mount the caps?
Or is there something more suitable?
Stephen Hobley Photography
317 201 4281
The Laser Harp Project - www.stephenhobley.com/build
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