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Re: primary/sec clearance (fwd)
---------- Forwarded message ----------
Date: Sun, 29 Mar 1998 11:42:26 -0700
From: "D.C. Cox" <DR.RESONANCE-at-next-wave-dot-net>
To: Tesla List <tesla-at-pupman-dot-com>
Subject: Re: primary/sec clearance (fwd)
to: Bob
Sec. winding should start approx 1 1/2 inches above a horizontal plane
drawn across the top of the primary coil. Pri to sec spacing approx 1 1/4
to 1 1/2 inches with a flat spiral primary -- gives reliable coeff. of
coupling around 0.18 to 0.2 range.
DR.RESONANCE-at-next-wave-dot-net
----------
> From: Tesla List <tesla-at-pupman-dot-com>
> To: tesla-at-pupman-dot-com
> Subject: primary/sec clearance (fwd)
> Date: Saturday, March 28, 1998 10:26 PM
>
>
>
> ---------- Forwarded message ----------
> Date: Sat, 28 Mar 98 00:37:36 GMT
> From: yubba <yubba-at-clara-dot-net>
> To: Tesla List <tesla-at-pupman-dot-com>
> Subject: primary/sec clearance
>
> As this is my first post to this list I would like to say hello to
everybody. I
> am just starting my first coil and have just finished the primary. I am
using 8
> millimetre (3/8") copper tube and have gone for a saucer shape with a 30
degree
> angle with spacing of 8 mm between turns. When I worked out the spacing
to
> obtain a true spiral I allowed 25mm between the secondary and the primary
but
> this seems to have grown to 30 mm at the start of turn 1 to 50 mmm at the
start
> of turn 2. Do I need to tighten this up at all or will it be ok. My
tubing comes
> in 10 metre coils so I have got 10 turns. My secondary is pvc pipe 110
mm by
> 600 mm. I havent wound the secondary yet but will be using .6mm wire and
going
> for 800 turns.I have made a RQ type spark gap and will be using a 9kv 50
mA
> neon. The cap question has not yet been addressed as I am still
undecided
> between a flat plate using old litho plates and A4 poly paper protectors
of
> which I have lots or a rolled cap if I can find any suitable ally.
Aluminium
> Roof flashing does not seem to be used in the UK much. They still use
lead
> according to the local (large) building materials supplier. I have a
vacuum pump
> so it seems to be down to the container, as someone pointed out recently.
Any
> help would be much appeciated. Thanks for the wealth of info already out
there,
> as bill wysock pointed out without e mail we would be very much on our
own and
> in the dark.
>
> bob golding Lightning without rain
> bob-at-clara-dot-net
>