RE: Strange behavior

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Loudner, Godfrey by way of Terry Fritz <twftesla-at-qwest-dot-net>" <gloudner-at-SINTE.EDU>

Perhaps your static gap is developing extreme hot spots on the electrodes
which stop the quenching action. Increase the suction through your gap to
see if this stops the problem or changes much the amount of time it takes
for the problem to develop. 

Godfrey Loudner



 
> -----Original Message-----
> From:	Tesla list [SMTP:tesla-at-pupman-dot-com]
> Sent:	Sunday, July 08, 2001 9:14 PM
> To:	tesla-at-pupman-dot-com
> Subject:	Strange behavior
> 
> Original poster: "J. B. Weazle McCreath by way of Terry Fritz
> <twftesla-at-qwest-dot-net>" <weazle-at-hurontel.on.ca>
> 
> 
> Hello Coilers,
> 
> While running my coil earlier this evening I had a strange occurance
> that I'd like to have explained to me.  After about a full minute of
> firing, the streamers just stopped like a swich had been thrown, but
> the gap continued to fire.  I shut down for about five seconds, then
> fired up again and the streamers where back as before for about the
> same time interval and then they stopped again.
> 
> Switching everything off and taking the shorting sticks to all of the
> hot spots, I began looking for a probable cause.  The MMC showed not
> even the slightest bit of heating on any of the 96 caps, all of the
> primary and secondary connections where secure, and as I said before,
> the gap continued to fire even when the streamers stopped, so I ruled
> out a problem with it or the power source.  Ideas anyone?
> 
> Here's the coil details:
> 
> Power:  10/70 OBIT stack with PFC
> Cap:    0.0258 uF. -at- 25 KV MMC
> Gap:    7 segment RQ/TCBOR with suction quench
> Prim:   14 turn 1/4" tube, 20 degree inv. cone
>         tapped at turn 7
> Sec:    4" x 22" 800 turns of no. 22
> Toroid: 16" x 4" over 11" x 4" flex duct, 24 pF.
> 
> Normal streamers are 3 or 4 simultaneous of 30 to 36 inches.
> 
> 
> 73, Weazle, VE3EAR/VE3WZL
> 
> Listening: 147.030+ and 442.075+
> E-mail:    weazle-at-hurontel.on.ca
>            or ve3ear-at-rac.ca
> Web site:  www.hurontel.on.ca/~weazle
> 
>