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1. [AMPS] Gassy Tubes and Gas Arcs (score: 1): Author: jono@webspun.com (Jon Ogden); Date: Sat, 16 May 98 16:05:22 -0500; Question for some of you tube experts: John Lyles post explained how gasses liberated from the plate in a tube can produce gas arcs inside the tube and casue serious damage. Fine and dandy. Understoo; /archives//html/Amps/1998-05/msg00292.html (8,468 bytes)
2. [AMPS] Gassy Tubes and Gas Arcs (score: 1): Author: n1rj@ime.net (Roger D. Johnson); Date: Sat, 16 May 1998 22:33:12 +0100; Are you sure it's gas, Jon? I seem to remember that some tubes produce a blue flouresence on the inside of the envelope when bombarded by wayward ions. Many mistakenly assume the tube is gassy when t; /archives//html/Amps/1998-05/msg00295.html (8,009 bytes)
3. [AMPS] Gassy Tubes and Gas Arcs (score: 1): Author: measures@vc.net (Rich Measures); Date: Sat, 16 May 98 15:33:06 -0800; With enough gas, I know the electric mains breaker will trip. There are two kinds of blue glow with 8166/4-1000A tubes: Where the electron beam strikes the glass envelope, and in the evacuated space; /archives//html/Amps/1998-05/msg00298.html (9,756 bytes)
4. [AMPS] Gassy Tubes and Gas Arcs (score: 1): Author: jono@webspun.com (Jon Ogden); Date: Sat, 16 May 98 18:04:49 -0500; Well, you have a good point... The glow is around the top part of the tube: around the anode and the upper part of the glass envelope. I always thought that nice blue glow was gas. When you say betw; /archives//html/Amps/1998-05/msg00299.html (8,708 bytes)
5. [AMPS] Gassy Tubes and Gas Arcs (score: 1): Author: jono@webspun.com (Jon Ogden); Date: Sat, 16 May 98 18:08:08 -0500; In the evacuated space??? Isn't the whole tube evacuated?? Please explain... 73, Jon KE9NA -- Jon Ogden KE9NA http://www.qsl.net/ke9na "A life lived in fear is a life half lived." -- FAQ on WWW: htt; /archives//html/Amps/1998-05/msg00301.html (8,664 bytes)
6. [AMPS] Gassy Tubes and Gas Arcs (score: 1): Author: measures@vc.net (Rich Measures); Date: Sat, 16 May 98 16:42:32 -0800; With luck. If one sees ionized gas, is the inside evacuated? Rich... R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps; /archives//html/Amps/1998-05/msg00303.html (8,813 bytes)
7. [AMPS] Gassy Tubes and Gas Arcs (score: 1): Author: n1rj@ime.net (Roger D. Johnson); Date: Sun, 17 May 1998 12:35:32 +0100; If it looks like it's on the inside of the envelope, it's ion bombardment. If it's inside the anode structure, then it's gas. In my early days, I replaced many tubes I thought were gassy! Good for RC; /archives//html/Amps/1998-05/msg00305.html (8,304 bytes)
8. [AMPS] Gassy Tubes and Gas Arcs (score: 1): Author: measures@vc.net (Rich Measures); Date: Sun, 17 May 98 07:02:27 -0800; That's pretty much it, Roger. However, "ion" means an atom that has gained or lost one or more electrons, I doubt that ions are involved. In this case, it appears that the flourescing material's ato; /archives//html/Amps/1998-05/msg00306.html (9,184 bytes)
9. [AMPS] Gassy Tubes and Gas Arcs (score: 1): Author: jono@webspun.com (Jon Ogden); Date: Sun, 17 May 98 23:03:46 -0500; So then if all of the tube isn't evacuated, none of it is evacuated. But you said that one blue glow is from electron beams striking the envelope. The other is in the "evacuated space." How do I kno; /archives//html/Amps/1998-05/msg00311.html (9,199 bytes)
10. [AMPS] Gassy Tubes and Gas Arcs (score: 1): Author: jono@webspun.com (Jon Ogden); Date: Sun, 17 May 98 23:07:19 -0500; Thanks for the info guys....Thought my tubes were getting gassy. 73, Jon KE9NA -- Jon Ogden KE9NA http://www.qsl.net/ke9na "A life lived in fear is a life half lived." -- FAQ on WWW: http://www.cont; /archives//html/Amps/1998-05/msg00312.html (9,396 bytes)
11. [AMPS] Gassy Tubes and Gas Arcs (score: 1): Author: measures@vc.net (Rich Measures); Date: Mon, 18 May 98 04:40:20 -0800; The evacuated space acts as one entity. The space is pretty well evacuated and sealed at manufacture. If a glass to metal seal has a microscopic imperfection, the vacuum fades as air invades. By obs; /archives//html/Amps/1998-05/msg00313.html (9,306 bytes)
12. [AMPS] Gassy Tubes and Gas Arcs (score: 1): Author: jono@webspun.com (Jon Ogden); Date: Mon, 18 May 98 08:51:26 -0500; Right. In other words, the entire tube inside the glass is "evacuated" space. So the glow from the beams striking the glass envelope is in the evacuated space. Other people have pointed out that if; /archives//html/Amps/1998-05/msg00315.html (9,825 bytes)
13. [AMPS] Gassy Tubes and Gas Arcs (score: 1): Author: measures@vc.net (Rich Measures); Date: Mon, 18 May 98 07:26:46 -0800; no. The glow is from within the glass. Seeing inside the anode is difficult. The glow I see is typically in the space between the lower outside of the anode and the grid or screen collet. semi-yes.; /archives//html/Amps/1998-05/msg00317.html (10,137 bytes)
14. [AMPS] Gassy Tubes and Gas Arcs (score: 1): Author: jono@webspun.com (Jon Ogden); Date: Mon, 18 May 98 09:46:05 -0500; So you are saying that the glow is happening INSIDE the structure of the glass itself? Interesting. I'll have to check and see about that. 73, Jon KE9NA -- Jon Ogden jono@webspun.com www.qsl.net/ke9; /archives//html/Amps/1998-05/msg00319.html (8,507 bytes)
15. [AMPS] Gassy Tubes and Gas Arcs (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Mon, 18 May 1998 07:40:49 -0700; Did you ever see a VR150, 0B2, etc. gas regulator tube? Or even a neon bulb? You can see the gas glowing inside the tube. It looks quite different from the fluorescence on the glass envelope of a tub; /archives//html/Amps/1998-05/msg00320.html (8,804 bytes)
16. [AMPS] Gassy Tubes and Gas Arcs (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Tue, 19 May 1998 07:24:49 +0000; To: <amps@contesting.com> Not only that, a gassy tube can also have no observable glow between the elements and still arc! Outgassing from elements is common (especially with graphite anode tubes), s; /archives//html/Amps/1998-05/msg00339.html (9,359 bytes)
17. [AMPS] Gassy Tubes and Gas Arcs (score: 1): Author: measures@vc.net (Rich Measures); Date: Tue, 19 May 98 08:36:01 -0800; To: <amps@contesting.com> blue And somehow leave no arc-craters in the metal? true , however, graphite anodes also scavange gas ... an oft' a fatal one. If one is high-pot. testing a tube cold (which; /archives//html/Amps/1998-05/msg00356.html (9,878 bytes)

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