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Re: Rotary Arc Gaps



to: Terry, Harvey

RRC has a dozen small 1800 rpm synchro motors left.  $35 plus $7.50 UPS
shipping while they last.

Regards,

Dr. Resonance-at-next-wave-dot-net


-----Original Message-----
From: Tesla List <tesla-at-pupman-dot-com>
To: tesla-at-pupman-dot-com <tesla-at-pupman-dot-com>
Date: Wednesday, February 17, 1999 7:29 PM
Subject: Re: Rotary Arc Gaps


>Original Poster: Terry Fritz <twf-at-verinet-dot-com>
>
>Hi Harvey,
>
> The gap should fire just as the voltage in the tank capacitor reaches the
>maxiumum voltage on the AC cyclce.  There are some resonant and dynamic
>effects that make this point occure latter than one would think if the
>charging circuit is resonant as in many neon systems.
>
> The short to the poser supply is handled though chokes or current limits
>in the transformers depending on what type of system it is.
>
> My neon system uses a 120BPS sync gap.  This is what it is designed for
>and the neon transformer just barely charges the cap to full voltage at
>this rate.  However, if one has a pole pig system that can charge the cap
>very quickly, you can go to higher break rates since the pig can charge the
>cap many times during an AC cycle.  Thus the very high break rates...
>
> There are sync motors around for not too much money or you can convert a
>regualar AC motor.  I have never done this so I'll leave it to others to
>explain or check the archives.
>
> Terry
>
>
>
>At 09:31 PM 2/16/99 PST, you wrote:
>>I have several questions regarding rotary arc gaps. Is not its purpose to
be
>>able to allow for the short on the arc gap contained in the tank LC
primary
>>to be timed so that this occurs precisely when the AC voltage input is
near
>>zero, thus negating the problem of the arc representing a short to the
power
>>supply? If such is the case this would be 120 shorts per second based on
60
>>hz. Why do some designs than use 720 bps which I assume must mean 720
bursts
>>or shorts per second? Also can I expect to pay around $500 just for a
>>synchonius motor to make a Rot. arc gap? I assume this must be purchased.
>>Are dc motors also used with many poles or shorts per revolution to
>>circumvent this cost? Thanx for any info. HDN
>>
>>
>>
>>
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>>
>>
>