Re: Coiling Waveforms.
From: John H. Couture[SMTP:couturejh-at-worldnet.att-dot-net]
Sent: Friday, August 08, 1997 12:55 AM
To: Tesla List
Subject: Re: Coiling Waveforms.
At 12:11 PM 8/7/97 +0000, you wrote:
>From: Bert Hickman[SMTP:bert.hickman-at-aquila-dot-com]
>Reply To: bert.hickman-at-aquila-dot-com
>Sent: Thursday, August 07, 1997 2:12 AM
>To: Tesla List
>Subject: Re: Coiling Waveforms.
>Tesla List wrote:
>> From: John H. Couture[SMTP:couturejh-at-worldnet.att-dot-net]
>> Sent: Wednesday, August 06, 1997 7:05 PM
>> To: Tesla List
>> Subject: Re: Coiling Waveforms.
>I can back up Malcolm's measurements. I've done numerous measurements on
>my 10" coil under various operating conditions in order to characterize
>its operational behavior. The longest ring-down time on the secondary
>only occured when the secondary did not break out, and after the primary
>gap quenches, since under these conditions the resonator is losing
>energy at the slowest rate. These measurements were performed in order
>to estimate effective secondary "Q" during various output streamer
>The bottom line:
>Even under the "best-case", no-breakout, condition, the resonator fully
>"rings down" prior to the NEXT gap firing. Each secondary energy "event"
>is essentially independent of the previous one. On my system, full
>ringdown occurred in about 1000 uSec when breakout was inhibited.
>Secondary ring-down dropped to about 100 uSec when streamers were
>present. [This translated to a non-breakout Q of about 188 going down to
>about 19 under breakout conditions].
>The time between successive gap firings (about 320 BPS) was of the order
>of 3X the longest ring-down period with no breakout, and about 30X the
>ring-down period when streamers were present. Since the rate of
>secondary energy loss significantly worsens when streamers are present,
>any proposal that secondary energy could somehow be building up on
>sucessive "bangs" is inconsistent with empirical measurements on
>operating 2-coil systems.
>-- Bert H --
Bert H. -
In studying your test waveforms did you notice anything that would
indicate a difference in waveform for the extra long spark? How do you
think the long spark is created? Do you think the long spark has more energy
than the short sparks? Where do you think the extra energy comes from?
How do you think the input watts should be split up between the long and
the short sparks for a standard watts per foot of spark rating? Is this
important enough to pursue?