Re: Twin coils
> Original Poster: "Harvey Norris" <tesla4-at-excite-dot-com>
> Concerning John Freau's observation
> > There's been a lot of postings about twin coils, dual gaps, etc.
> > I'd just like to clarify a few points.
> > 1) typical twin coils use one power supply, one gap system, and one
> > capacitor with either a series or parallel primary. By using this
> > set up, and winding the coils in the correct direction, a perfect
> > out of phase RF situation will occur which causes the sparks to
> > attract each other.
> I can agree with this and I did it with the primaries in series, but
> when I reversed the connections to one of the primaries, arcing
> between the systems still occured, but with less voltage showing as
> lesser length of arc. One of the systems was designed inefficiently as
> a large 10 ft diameter model with 48 turns of 14 gauge wire at one
> inch separation of turns. Could it be that the other interacting coil
> which was a more conventional 3/1 ht vs width ratio merely overpowered
> the weaker coil to produce this effect? 1500 ft of wire were used on
> both secondaries, the smaller coil was 20 inch diameter a couple of ft
> away from the larger coil.
> HDN in reply to John Freau's observations
There must have been a difference (however slight) in the frequency
the two coils were running at. If the h/d's were different and the
same length of wire was being used, I would say this is extremely
likely and the differences were not very small either.
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