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Re: Grounding Electrodes

Posted By: SVP Neon Equipment
Date: Thursday, 31 March 2011, at 3:43 p.m.

In Response To: Re: Grounding Electrodes (Dana)

> As far as whether you would want to create a
> controlled flashback: Seeing it fall away
> after the tube begins to heat and maintain
> the arc properly is part of the visual
> process of bombarding for me.

> When I was learning about flashbacks in the
> bombarding process in the beginning, it
> caused a lot of apprehension. After seeing a
> grounding electrode in action, I have seen
> the value of being able to monitor this
> bleed-off of the arc stream while at the
> beginning of the bombarding phase when a
> flashback is most likely to happen due to
> the resistance of the tube.

> In any event, I still practice extreme
> caution and close all valves while the high
> voltage is on. A few old timers I have
> observed bombard leave everything open,
> including the vacuum gauge sensor-of course
> not everyone has their sensor behind a
> stopcock either.

As I said, if it makes you feel safer... But I am still perplexed why someone with your obvious experience and expertise would rely on, of all things, a "controlled bombarder flashback" to judge processing criteria and, no less, actually consider it a repeated valuable function. But it is refreshing to read that you still practice "extreme caution" while using this method of monitoring bombarding parameters. I am curious to know where you learned about bombarder flashbacks and who or what instilled apprehension in you regarding this phenomenon. In this situation, my experience has been that such a feeling is usually the result of ignorance rather than being informed. But again, perhaps I can learn something here if someone can explain to me and convince me why having a bombarder discharge going in to my manifold is a good thing rather than a bad thing.

Mark

SVP Neon Equipment

Messages In This Thread

• Grounding Electrodes -- Dana -- Wednesday, 30 March 2011, at 5:01 a.m.
  • Re: Grounding Electrodes -- SVP Neon Equipment -- Wednesday, 30 March 2011, at 12:05 p.m.
    • Re: Grounding Electrodes -- Dana -- Wednesday, 30 March 2011, at 7:22 p.m.
      • Clamps & vacuum -- SVP Neon Equipment -- Thursday, 31 March 2011, at 3:41 p.m.
        • Re: Clamps & vacuum -- neontek -- Sunday, 3 April 2011, at 8:39 p.m.
  • Re: Grounding Electrodes -- Dana -- Wednesday, 30 March 2011, at 7:49 p.m.
    • Re: Grounding Electrodes -- SVP Neon Equipment -- Thursday, 31 March 2011, at 3:43 p.m.

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