Re: Strange behavior

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

Original poster: "Malcolm Watts by way of Terry Fritz <twftesla-at-qwest-dot-net>" <m.j.watts-at-massey.ac.nz>

Hi J.B.,
          Did the tone of the gap change when the output discharges 
stopped (like going from a crisp buzzzzzzz to a continuous fizzle)? 
If gap operation didn't appear to change, a carbon track inside the 
coil is a possibility. 

?
Regards,
Malcolm


On 8 Jul 01, at 20:14, Tesla list wrote:

> 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
> 
> 
> 
>