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Total 4 documents matching your query.

1. [AMPS] advice on an old SB-220 (score: 1): Author: ccc@space.mit.edu (Chuck Counselman); Date: Fri, 10 Nov 2000 16:54:00 -0500; This is as much a question as an answer, but FWIW: I know nothing about 3-500Z's, but a close friend and co-worker successfully degassed quite a few 50-year-old (WW II vintage) 807's and other relati; /archives//html/Amps/2000-11/msg00100.html (8,480 bytes)
2. [AMPS] advice on an old SB-220 (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Fri, 10 Nov 2000 17:16:18 -0500; It's been recently said on this reflector (and not contradicted, which may be almost a first!), that the gettering material in 3-500s is on the plate, and that the plate must show slight color for th; /archives//html/Amps/2000-11/msg00101.html (9,201 bytes)
3. SV: [AMPS] advice on an old SB-220 (score: 1): Author: sm5ki@algonet.se (sm5ki); Date: Sat, 11 Nov 2000 06:18:17 +0100; In the latest issue of the Brittish ELECTRONICS WORLD (11/2000) there is an interesting article called " NEW LIFE FOR OLD VALVES" where the author actually accelerated the gettering process by a fact; /archives//html/Amps/2000-11/msg00104.html (9,927 bytes)
4. SV: [AMPS] advice on an old SB-220 (score: 1): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Sat, 11 Nov 2000 08:35:19 +0000; Small-signal tubes are gettered by a chemically reactive metal film (usually barium, mostly) on the inside of the glass. You can see the "silver" film inside, usually at the top. This operates at low; /archives//html/Amps/2000-11/msg00106.html (12,718 bytes)

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