Re: Latest coil - update
In <4.1.19990910173112.00a0a810-at-pop.dnvr.uswest-dot-net>, on 09/10/99
at 05:31 PM, Tesla List <tesla-at-pupman-dot-com> said:
>Original Poster: FutureT-at-aol-dot-com
>In a message dated 99-09-10 07:57:24 EDT, you write:
>I wonder why those changes would reduce the spark length? I didn't
>expect that. It could be that the total secondary and toroid C is
>now just too large for the amount of power, that's my guess.
Hi John. Could be since last night I replaced the first toroid which
is 5" cross-section with a 7" cross-section slightly larger diameter
one. The sparks dropped to 66" and the arcs from the bottom toroid to
the primary sounded like gunshots. This coil seems to need the toroids
>I suspect that if you built a new secondary that is narrower, maybe
>8" or 9" wide, but taller at maybe 32" or so, then use the toroid
>combo, it would work well. I say this because when I once used a
>wide short secondary, it both developed racing sparks, and demanded a
>smaller toroid. I suspect that if the power is limited, the total
>combined secondary and topload C shouldn't be too large. (if one is
>larger, the other must be smaller and vice versa).
>In general, I found wide short secondaries to be *troublesome*. But
>it's mostly the shortness that causes the real trouble.
Yeah, it's time to build a taller one. I have one other thing left to
try and that is an even shorter coil that I wound once for a small
magnifier. May set it on top of the other one and connect the wires.
This would make it another 16" taller.
>Just some thoughts.
And always helpful ones. Thanks.