Re: Sync-TC, latest results

To: "'Tesla List'" <tesla-at-poodle.pupman-dot-com>
Subject: Re: Sync-TC, latest results
From: Tesla List <tesla-at-stic-dot-net>
Date: Fri, 24 Oct 1997 23:49:18 -0500
Approved: tesla-at-stic-dot-net

From: 	John H. Couture[SMTP:couturejh-at-worldnet.att-dot-net]
Sent: 	Friday, October 24, 1997 12:27 PM
To: 	Tesla List
Subject: 	Re: Sync-TC, latest results

At 04:43 AM 10/24/97 +0000, you wrote:
>
>From: 	Mike Harrison[SMTP:wwl-at-netcomuk.co.uk]
>Reply To: 	wwl-at-netcomuk.co.uk
>Sent: 	Thursday, October 23, 1997 12:28 PM
>To: 	Tesla List
>Subject: 	Re: Sync-TC, latest results
>
-----------------------------------------------------

  Mike -

  Several years ago I compiled a list of test spark results from about 3
dozen Tesla coils of good design. I needed this type of information for my
JHCTES computer program. I converted this empirical data by math regression
methods into equations that a computer could use. The spark lengths varied
from one inch to 36 feet. The spark lengths depend upon the input wattage,
primary voltage, secondary inductance, etc. 

  The spark lengths are for controlled spark lengths. It is interesting that
the JHCTES spark lengths are still fairly accurate today to +/- 15 percent.
This is when the program inputs are accurate and the coil is well
constructed by an experienced coiler. It is also interesting that those rare
long sparks of today are longer than in the past. This could be due to
differences in construction and better quality materials, or maybe we do not
completely understand how Tesla coils work. It appears that some coilers are
today doing something different than in the past. 

  The program cannot be used to check Malcolm's 300 watts for 5 foot sparks
because I understood him to say that the 300 watts was not the power
transformer input. The JHCTES program needs the power transformer input to
give the correct controlled spark length.

  John Couture

------------------------------------------------------
>>
>>A question for Malcolm:  In a recent post, you mentioned a coil
>>that gave about 5 foot sparks with the caps supplying only 300
>>watts.  This is much better than my results, would you be willing
>>to re-post the specs for the cap, pri, sec, toroid, etc. for this coil,
>>and any pertinent comments?  Thanks in advance.
>
>Has anyone compiled a list of coilers' results ? 
>This would be useful to get an idea whether a new coil was performing
>better/worse than expected. A simple table in a standard format with
>one line per coil, things like VA in, Transformer rating, pri/sec
>size/turns, capacitor, topload size, gap type and spark length
>How about someone compiling one ?
>Maybe a web page with form entry to standardise format ?