Re: Flat spiral or helical primary?

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

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

At this time I have no data and only one solinoid secondary coil. My tube
coil has the primaries wound on a plastic pipe coil form with plastic
separating my primary and secondary. The secondary is a cone coil  with only
1/8 " separation + the plastic at the base of the coil. The base is grounded
and the coil is a 36.5 o top angle. The secondary is elivated 3/4 " above
the primary base with the grid coil on the bottem. This coil has been in use
since wwII. While it is the lowest power out it is stable at about 250,000V
so I use it for most research. Both of my "KICKER COIL" TS"S are cone coils.
one is 12 o and the other is 29 o top angle with the primary spaced 1/2 "
from the secondary. My SGTC has 2 selectable primaries. a 25 x 6" 18T flat
primary and a double wind 18T 6 x 8 cone primary 8" on top with a 4.5" x 34"
solinoid secondary spaced wound,15/60 NST powered.I have a 29 x 8" cone
secondary SGTC under construction.I like the cone secondary best, They have
less racing sparks and I have better control of my output voltage with out
neading insulating bands on my secondary.The solinoid TC has more BANG for
the buck$
   Robert  H  
> From: "Tesla list" <tesla-at-pupman-dot-com>
> Date: Sat, 02 Mar 2002 20:29:09 -0700
> To: tesla-at-pupman-dot-com
> Subject: RE: Flat spiral or helical primary?
> Resent-From: tesla-at-pupman-dot-com
> Resent-Date: Sat, 2 Mar 2002 20:46:27 -0700
> 
> 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
>> 
>> 
>> 
>> 
>> 
> 
> 
> 
> 
> 
>