In a magnifier, the secondary generally has much lower
inductance and thicker wire than the extra coil (3rd coil).
The primary and secondary are very closely coupled at
k = 0.35 or higher. Usually a long metal rod or tube
connects the top of the secondary to the bottom of
the extra coil. The secondary has a toroid or corona
ring at the top and the rod connects to this.
John
-----Original Message-----
From: John Cooper <wt5y@xxxxxxxxx>
To: futuret <futuret@xxxxxxx>
Sent: Tue, Dec 23, 2014 11:19 pm
Subject: Re: [TCML] New nst/primary strikes
Thanks will try that when I'm off again. Since you brought up magnifiers am I right in that the top of the secondary toroid has gto wire that will feed another secondary coil just like the first?
Sent from my Cricket smartphone
-------- Original message --------
From: Futuret <futuret@xxxxxxx>
Date: 12/23/2014 20:00 (GMT-06:00)
To: wt5y@xxxxxxxxx,tesla@xxxxxxxxxx
Subject: Re: [TCML] New nst/primary strikes
The lower toroid has to be close to the top of the secondary to
prevent breakout from the top windings. Therefore the space
has to be between the toroids if you want to do any toroid
raising. Generally it works a lot better with the small
toroid below the large one. If you put the small toroid
on top, the sparks will likely still emit from the large
toroid. It's possible that this arrangement might
give the sparks an upward bias, I don't remember.
The reason you
often see the toroids touching is because coilers
often just rest one toroid on top of the other.
However the spaced toroid method works
very well. If the top toroid is too heavy,
the 1/4 20 threaded rod might get a little
wobbly, but will likely be OK. Some folks
put a pvc or metal cylinder of some sort
between the two toroids. There are various
approaches that can be used. I don't know
how high the upper toroid can be raised
before other problems might develop?
(I never tried raising it more than a few
inches). Actually Richard Hull of the
TCBOR had a magnifier setup in which
the upper toroid was maybe a foot higher
than the lower one, and there was a cone-
like metal piece connecting the two,
and that system worked well.
Christmas Greetings to All,
John
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