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Re: Optimal Quench Tests
Subject:
Re: Optimal Quench Tests
Date:
Mon, 31 Mar 1997 06:48:14 -0800
From:
Bert Hickman <bert.hickman-at-aquila-dot-com>
Organization:
Stoneridge Engineering
To:
Tesla List <tesla-at-pupman-dot-com>
References:
1
Tesla List wrote:
>
> Subject:
> Optimal Quench Tests
> Date:
> Sun, 30 Mar 1997 19:56:25 -0500 (EST)
> From:
> FutureT-at-aol-dot-com
> To:
> tesla-at-pupman-dot-com
>
> All,
>
> I set up a small 360 VA (12kV, 30ma neon) coil for quench testing.
> Steady
> first notch quenching was achieved at k = .11, k = .12, and at k = .18,
> spark
> length was 36".
>
> Specs are as folllows; Primary is #12 standed pvc ins, 15 degree
> inverted
> cone, tapped at 33 turns (448uH). C = 0.007uF, polypropylene.
> Secondary is
> 6- 1/2" by 23" plastic form wound with #28 formvar, L = 108mH. Resonant
> frequency without toroid is 130 kHz, with toroid is probably about 100
> kHz or
> so. Toroid is 4" by 17" aluminum dryer duct. Gap is a 120 BPS
> synchronous
> 12 point super-series quench rotary (the spark snakes through 12 gaps
> during
> each firing). There are 12 spinning and 12 stationary electrodes, all
> electrodes are 1/8" dia. stainless steel. Motor is 3600 rpm, 1/10 HP
> salient
> pole design with ~7" rotor. Six of the gaps are "offset". Maximum
> voltage
> applied to the Tesla coil transformer is 125 volts.
<SNIP>
John,
Great experiment! In order to hit k=.22 without self-destructing your
secondary, you may need to use a relatively heavy overcoating of some
type (Behr or similar). Also, its very interesting that you were seeing
near-linear ringdown on the secondary - this may indicate that the power
dissipation properties of heavily-conducting secondary streamers are
similar to that observed in the primary circuit arc...
Safe coilin' to you, John!
-- Bert --
<SNIP>
>
> Towards optimal coiling,
>
> John Freau