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1. [Amps] Tube Storage, vacuum containers (score: 1): Author: Patrick Barthelow <apolloeme@live.com>; Date: Fri, 30 Apr 2010 06:31:34 -0700; Years ago I saw some vacuum packaged 4CX 250B tubes, at a military base MARS station. The 250Bs, were in OD green cans about half the size of a can of chili and had molded plastic suspension inserts; /archives//html/Amps/2010-04/msg00704.html (8,365 bytes)
2. Re: [Amps] Tube Storage, vacuum containers (score: 1): Author: "Sam Carpenter" <sam@owenscommunication.com>; Date: Fri, 30 Apr 2010 10:30:04 -0400; I am surprised that the Russians are not doing that. In the past when I purchased bulk eastern block machinegun ammo, it had always been packaged in "sardine cans" that were pumped down and then pain; /archives//html/Amps/2010-04/msg00705.html (10,396 bytes)
3. Re: [Amps] Tube Storage, vacuum containers (score: 1): Author: James Colville <jimw7ry@gmail.com>; Date: Fri, 30 Apr 2010 07:48:25 -0700; Is this some sort of April fools joke? Do you know what the vacuum is (how little air is actually) inside of a 3-500? 73 Jim W7RY _______________________________________________ Amps mailing list Amp; /archives//html/Amps/2010-04/msg00706.html (11,192 bytes)
4. Re: [Amps] Tube Storage, vacuum containers (score: 1): Author: "Sam Carpenter" <sam@owenscommunication.com>; Date: Fri, 30 Apr 2010 11:09:40 -0400; The discussion is about storage. If there is leakage of the ambient atmosphere into the tube, and there is, and you have it in a near vacuum, how could it not mitigate the problem over time. No air o; /archives//html/Amps/2010-04/msg00707.html (12,105 bytes)
5. Re: [Amps] Tube Storage, vacuum containers (score: 1): Author: Patrick Barthelow <apolloeme@live.com>; Date: Fri, 30 Apr 2010 08:16:20 -0700; Actually yes... No Joke... I understand the difference between a hard vacuum, like a 3-500Z has and a "soft" vacuum. I am just thinking that what may be useful, is to reduce the differential pressure; /archives//html/Amps/2010-04/msg00708.html (13,794 bytes)
6. Re: [Amps] Tube Storage, vacuum containers (score: 1): Author: "Sam Carpenter" <sam@owenscommunication.com>; Date: Fri, 30 Apr 2010 11:20:22 -0400; 3-500z should be in the range of (pressure: Torr) 1×103 to 1×109 Pressure Pa around 100 mPa to 100 nPa Is this some sort of April fools joke? Do you know what the vacuum is (how little air is actuall; /archives//html/Amps/2010-04/msg00709.html (11,451 bytes)
7. Re: [Amps] Tube Storage, vacuum containers (score: 1): Author: Patrick Barthelow <apolloeme@live.com>; Date: Fri, 30 Apr 2010 09:05:47 -0700; Also, and I obviously have not been around labs that deal in vacuum physics, or processes, but I remember seeing a tube of "Vacuum Grease" somewhere that apparently is used to seal glassware valves,; /archives//html/Amps/2010-04/msg00710.html (15,666 bytes)
8. Re: [Amps] Tube Storage, vacuum containers (score: 1): Author: Roger <sub1@rogerhalstead.com>; Date: Fri, 30 Apr 2010 17:57:49 -0400; 10^-3 torr is just a hard enough vacuum that the blue glow (ionization) goes out. Mechanical pumps are good for about 10^-1 torr which is about the point where the tube "ignites", or the higher vacuu; /archives//html/Amps/2010-04/msg00713.html (15,453 bytes)

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