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Re: kVA vs OD (was: Can anyone help ?)
John Freau wrote:
> That's great news that you're now running with the larger toroid.
>
> Did the BPS of coalescence change with the new larger toroid?
If it did, it didn't change by much. The spark growth seems
to 'take off' around 300 BPS.
> How much longer is the spark output with the new toroid vs. the
> old one for a given input power?
It's not actually longer, since both toroids would produce ground
strikes averaging about 25ft long. However the old toroid would
give a gnd strike maybe every 10 sec, where the new one will strike
about every 1-2 sec, and produces a pleasant 'ripping sound' when
doing so, especially when hitting dirt instead of pavement.
The best that this coil has ever done is 32ft, but that was at
38kVA, and with a longer secondary coilform that raised the
electrode height to over 20ft, allowing longer arcs to develop.
A crummy pic of the 32ft arc can be seen at:
http://www.lod-dot-org/electrum/longshot.jpg
In this test, the top electrode is an earthmover innertube
coated with foil, that is just over 8ft in outer diameter.
--
-GL
www.lod-dot-org