RE: Flat spiral or helical primary?

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "John H. Couture by way of Terry Fritz <twftesla-at-qwest-dot-net>" <couturejh-at-mgte-dot-com>


Robert -

Do you have any test data? Including the Pri to Sec distances for the inner
turn of the spiral and the radius for the helical coil.

John Couture

--------------------------------

-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Saturday, March 02, 2002 9:51 AM
To: tesla-at-pupman-dot-com
Subject: Re: Flat spiral or helical primary?


Original poster: "rheidlebaugh by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<rheidlebaugh-at-zialink-dot-com>

The choice of primaries has to do with coupeling and racing sparks. The
solinoid coil has higher coupeling with all the associated problems. The
flat coil is less prone to problems. I use solinoid for power, cone, and
flat coil for big HV ark streamers. Each has its place. Most tube TC use
solinoid coils due to the low drive current and the nead for close
coupeling.When I'm doing research I want control. When killing mosquitos I
want boom , bang, and ozone filled air.
  Robert  H

> From: "Tesla list" <tesla-at-pupman-dot-com>
> Date: Fri, 01 Mar 2002 10:20:10 -0700
> To: tesla-at-pupman-dot-com
> Subject: Flat spiral or helical primary?
> Resent-From: tesla-at-pupman-dot-com
> Resent-Date: Fri, 1 Mar 2002 10:30:39 -0700
>
> Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> <Parpp807-at-aol-dot-com>
>
> Can someone please 'splain me the relative merits
> of a primary wound as a flat Archimedes spiral and
> a primary wound as a helical solenoid?
>
> I have seen a few coils use a solenoid primary. A few
> wound with strap, but it seems that these are usually
> large coils. The flat, Archimedes spiral is almost
> always used by coilers. Why?
>
> I am in the process now of converting one of my
> 24 inch secondaries from the twin bipolar into a
> 1/4 wave coil. I have many solenoids of various
> configurations that I will at least try with the
> 1/4 wave TC before making a flat coil.
>
> Happy day,
> Ralph Zekelman
>
>
>
>
>