Spark Gaps

From:  John H. Couture [SMTP:couturejh-at-worldnet.att-dot-net]
Sent:  Wednesday, April 15, 1998 12:54 AM
To:  Tesla List
Subject:  Re: Spark Gaps

 At 03:50 AM 4/13/98 -0500, you wrote:
>From:  richard hull [SMTP:rhull-at-richmond.infi-dot-net]
>Sent:  Sunday, April 12, 1998 5:05 AM
>To:  Tesla List
>Subject:  Re: Spark Gaps
>At 08:33 PM 4/11/98 -0500, you wrote:
>>From:  Bert Hickman [SMTP:bert.hickman-at-aquila-dot-com]
>>Sent:  Friday, April 10, 1998 10:25 PM
>>To:  Tesla List
>>Subject:  Re: Spark Gaps
>>Thratron or transistor switches were used by Richard Hull and Malcolm
>>Watts respectively to switch off primary current at earlier current
>>"zeros" (of the coil's fundamental operating frequency) during a number
>>of very interesting quenching experiments last year. Malcolm's attempts
>>to turn off a low-power transistor-switched primary circuit at points
>>other than primary current zeros did result in the expected high voltage
>>spikes stemming from rapid di/dt, but it's not clear that the an arc's
>>characteristics will permit this to actually occur under any reasonable
>>circumstance in higher power air-gap systems.


  Did these tests quench dampened waves or pulsed waves?

  John Couture