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Old 16th March 2004, 06:49 PM   #21
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Default Neon Bulb RF Probe

Nice tip, SY.

I remember when I was a kid, one of the presentations at Chicago's Museum of Science and Industry had a lecturer holding a fluorescent bulb in a EM field, and the bulb lighting up. I remember being concerned that the lecturer would be fried.

Anyway, can you explain what "UHMW plastic" is?

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George Ferguson
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Old 16th March 2004, 06:59 PM   #22
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UHMW = "ultra high molecular weight polyethylene"

It's highly insulating, non-hygroscopic, and reasonably stiff. I learned this trick working on RF linear amplifiers when I was a kid; 3kV concentrates one's attention. Avoid using carbon-fiber reinforced rods or anything like wood or nylon which picks up moisture.

The eye protection is a great tip which totally slipped my mind. I've worn glasses for the past 43 years, always get safety lenses, so I really take this for granted. And I shouldn't. Safety glasses are also important for general construction work, what with flying bits of clipped wire and solder splashes.
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Old 16th March 2004, 07:06 PM   #23
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Quote:
non-hygroscopic
Ironic how I can go many decades without knowing a word exsists and suddenly it becomes part of daily conversation.

I just wrote a spec into an RFP regarding a piece of equipmenst resilience with repect to hgroscopic dust. Crud that atracts condensatiom.
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Old 16th March 2004, 07:19 PM   #24
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My fault for slipping into jargon. I can't help it- I'm a materials guy.
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Old 16th March 2004, 09:04 PM   #25
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Quote:
I'm a materials guy
as opposed to an ehterial guy?

what a -corker-
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Old 17th March 2004, 02:57 AM   #26
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Strongly suggest to make this thead permanent!!!
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Old 17th March 2004, 03:53 AM   #27
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Done- and moved to a more permanent spot, too.
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Old 17th March 2004, 04:04 AM   #28
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I suppose my dyslexsic fumblings could be removed

ie) post 25
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Old 18th March 2004, 07:11 PM   #29
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Default Move Back to Tubes for Awhile?

Cool!

I'm honored that folks participated in this thread and made it worthwhile. I also notice that it has languished since it moved.

Maybe folks have contributed all they want to, but I'm wondering if you could move it back to tubes for awhile, until we are sure all our tube folks have had a chance to contribute? I don't think the tube clientel necessarily check out this forum.

Also, once I'm sure everyone who's going to contribute has, I'll summarize it for reference and comment.

Anyone tell to care me what the difference is, if any, between an isolation transformer and a Ground Fault Interrupt outlet?

Best,

George Ferguson
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Old 18th March 2004, 07:41 PM   #30
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I left a "forwarding address" in the Tubes section. It may have slid out of sight just because there were no new postings.
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