[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: Streamer loading effect
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
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".
> 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.