Re: Streamer loading effect

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

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

In a message dated 8/12/02 1:09:25 AM Eastern Daylight Time, tesla-at-pupman-dot-com
writes:

Steve, all,

I should clarify I think.  I had an older coil I called my "research
coil".  This gave 42" sparks from an ordinary 12/30 NST when
powered by a 140 volt variac.  This set-up drew about 620 Watts,
(Watts, not VA).  Then I decided to make a portable
coil which I called the TT-42, which means TableTop 42" spark.
However, because I made the secondary shorter to be more
compact, it gave only 38" sparks from the normal NST.  Since
I wanted to get 42" sparks, I installed a robust 12/30 that I happened
to have, and that did the trick.  In other words, the TT-42 is not
designed for maximum efficiency, but rather for compactness.
It is rather efficient however anyway.   In a recent test, I installed
a larger (6" x 24") toroid onto the TT-42, and it then gave 44" sparks.

The main point I was making in my other post is that NST's can
draw more than their rated power in a TC application.  This needs
to be considered when calculating "efficiency".

Cheers,
John


>
> Hi Bart,
>
> I like you TC calculator very much.  Thanks for clearing all this efficiency 
> stuff up for me.  I probably have not seen Johns coil when he had the 38" 
> sparks, and i had a feeling that "robust" had something to do with that.  
> And i didnt know about the variac for a 140v setting.  I can not verify what 
> my coil is eating, besides that its more than 15A.  It throws my 15A breaker 
> box often, but not my 25A fuse in the house.  My ammeter sucks so i dont 
> trust it for more than a rough estimate.  I also need to power factor since 
> im dimming the lights in parts of the house that are on my circuit.
>
> Steve Ward.
>
>