Re: secondary coil for pole pig

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "David Rieben" <drieben@xxxxxxxxxxxxxxx>

Hi Mikes,

I have used a 12" Quikrete tube as a secondary coil form for
one of my previous big coils and got excellent results with it.
I did prep it a bit by sitting it out in the sun on a hot summer
day for several hours to make sure that I got out any possible
moisture that was in the cardboard and then coated it inside
and out with several layers of spar polyurethane before wind-
ing the secondary coil on it. I also added multiple coats of
the spar poly over the secondary coil wire once winding was
completed. The only real disadvantage that I could see about
using cardboard vs. plastic is that cardboard is physically not
very sturdy, but otherwise, it worked perfectly. The total se-
condary coil length was 38.5" and with a 9x30 toroid, I got 8
to 10 ft. spark from this coil. I have long since dismantled that
particular coil but I do still have that secondary sitting in the
corner of my garage. I think you may have seen it when you
and Ken came by to see my "Green Monster" back in Janu-
ary.

David Rieben


----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Tuesday, March 14, 2006 10:30 PM
Subject: secondary coil for pole pig


> Original poster: "miles waldron" <mileswaldron@xxxxxxxxxxx>
>
> Is it OK to use one of those quick crete card board tubes from Home Depot
> that is 8 inches or 12 inches in diameter to build a 1200 turn #20 wire
> secondary? I want a big secondary to work with my 15KVA pole pig. The card
> board tubes seem to be waxed inside. If this is possible can someone provide
> any advice? If this is not a good idea, can someone please tell me why?
>
> Thanks!