Roger,
Your 7 KVA DC coil looks great and intriguing. How about sharing the
design
& specs of it on this list. And what is that ghostly toroid-looking thing
above and to the left of the real one?
Thanks,
--Steve Y.
-----Original Message-----
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
Of Roger Smith
Sent: Tuesday, July 29, 2008 7:14 AM
To: Tesla Coil Mailing List
Cc: teslafy@xxxxxxxxxxxxxxx
Subject: Re: [TCML] NE Ohio Coiling Activities.
I think I could make it out that way for a Teslathon in September. I
live
in Chillicothe, about 40 miles south of Columbus, OH. It just so
happens that I'm haveing a Teslathon myself here on Satorday August 2.
In
case you havent heard about, here is a link with more info.
http://www.geocities.com/sciotoa/teslathon
Roger
----- Original Message -----
From: "Harvey Norris" <harvich@xxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Cc: <teslafy@xxxxxxxxxxxxxxx>
Sent: Monday, July 28, 2008 3:56 PM
Subject: [TCML] NE Ohio Coiling Activities.
Recently purchased variable speed AC drive for winding secondaries. With
a slip belt drive at 5 hz we have produced a variety of secondaries of
good craftsmanship, and are testing these also with a variety of primary
designs.
Secondaries are wound on 4 in ID PVC tubing making for a 4.5 in OD. Two
of these at ~1 ft have been wound with an ample supply of 23 gauge wire,
and also a 2 ft winding with a higher h/d ratio/ which has entirely
confused me towards its actual resonant frequency compared to the 1 ft
model, and how the h/d ratio might change things. Today we wind another
1
ft section, but it is wound in the opposite direction to explore 2 ft
secondary bipolar secondary models in comparison to entire horizontal 2
ft
secondary wound in one direction vs two counter-wound secondaries of one
ft. from the center out. In the counter-wound model both the (left and
right) base spiraled primaries and secondaries will be wound mirror image
to each other from the perspective of a center vertical plane dividing
point; or in other words they are mirror images of each other.
My good colleague Doc, is the craftsman here and he has also built a
secondary winding on a thin funnel shaped cone and a counterpart inverse
conical primary, a very unusual design to wind to say the least. He
operated this at my set parameters of 15 nf where I was operating at
with a different helical designs of 1 and 2 ft; so I have no idea of what
capacity should be correct for his design, but he still obtained weak
effects. He put in quite a bit of effort here as the soldered top copper
ball shows the hillbilly ingenuity; but he is not good with numbers, as
sometimes neither am I and would like to post a pic of this in operation
for others to guess at the correct operating capacity. But I dont know
the procedure here at tesla list for posting pics. Doc is admittedly not
a coiler but an artist, so his design is undoubtably a shot in the dark.
I will plan on a tentative NE Ohio Teslathon for Sept if interest
shows. Things are finally coming together from years ago so this years
project at the new property appears to be the operation of dual 360 hz 3
phase bus alternators to create a true three phase interaction on TC
secondaries; which of course is a bold project. This is pending upon
wiring 220 volts to the end garage here; but the variable speed drive
might be tried for studying effects of frequency change.
Sincerely Harvey D Norris
330-968-4368
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