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Total 8 documents matching your query.

1. [Amps] PL172 (8295) (score: 1): Author: Chris Pedder <chris.g3vbl@gmail.com>; Date: Sat, 6 May 2017 14:11:16 +0000; For the last 37 years my Hallicrafter HT33A has been sitting on the floor in the garage with an 8295A (Ceramic) fitted. I have a pair of 'new in the box' PL172s one of whose boxes is still sealed. Pa; /archives//html/Amps/2017-05/msg00081.html (6,838 bytes)
2. Re: [Amps] PL172 (8295) (score: 1): Author: Ron Youvan <ka4inm@gmail.com>; Date: Sat, 6 May 2017 10:57:17 -0400; For the last 37 years my Hallicrafter HT33A has been sitting on the floor in the garage with an 8295A (Ceramic) fitted. I have a pair of 'new in the box' PL172s one of whose boxes is still sealed. P; /archives//html/Amps/2017-05/msg00082.html (8,072 bytes)
3. Re: [Amps] PL172 (8295) (score: 1): Author: RAY FRIESS <rayfrijr@msn.com>; Date: Sat, 6 May 2017 15:32:17 +0000; I would not be too concerned about leakage. It happens, but very very seldom. I have tubes that are still new in box from way back in WW2 that I have used and none have ever shown air leakage. Easies; /archives//html/Amps/2017-05/msg00083.html (8,835 bytes)
4. Re: [Amps] PL172 (8295) (score: 1): Author: "Carl" <km1h@jeremy.qozzy.com>; Date: Sat, 6 May 2017 11:46:02 -0400; The original PL-172 with glass seals is NOTORIOUS for air leakage and not outgassing from the anode.....big difference. Carl I would not be too concerned about leakage. It happens, but very very seld; /archives//html/Amps/2017-05/msg00085.html (9,553 bytes)
5. Re: [Amps] PL172 (8295) (score: 1): Author: Glen Zook via Amps <amps@contesting.com>; Date: Sat, 6 May 2017 16:12:59 +0000 (UTC); The chances of a PL-172, that has been unused for years, being good (no air leakage), are somewhere between extremely slim, and none! I have a very late version Hallicrafters HT-33A (has all the circ; /archives//html/Amps/2017-05/msg00086.html (8,882 bytes)
6. Re: [Amps] PL172 (8295) (score: 1): Author: Bill Turner <dezrat@outlook.com>; Date: Sat, 6 May 2017 16:15:07 +0000; -- ORIGINAL MESSAGE --(may be snipped) REPLY: I would bring up the power slowly with a Variac, lest it become Fourth of July a bit early. 73, Bill W6WRT ______________________________________________; /archives//html/Amps/2017-05/msg00087.html (7,348 bytes)
7. Re: [Amps] PL172 (8295) (score: 1): Author: Alek Petkovic <vk6apk@bigpond.com>; Date: Sun, 07 May 2017 07:44:20 +0800; A 1kV megger will give you an immediate indication if there is any leakage. I use it on old tubes. I run them in a burn in jig which applys heater volts and blows air through the tube. Some of the ol; /archives//html/Amps/2017-05/msg00088.html (8,882 bytes)
8. Re: [Amps] PL172 (8295) (score: 1): Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>; Date: Sun, 7 May 2017 22:22:24 -0400; I agree with Carl, I haven't seen a good PL172 (glass seal) in ages. The ceramic versions seem to hold up well. I have an HT32B 73, Roger (K8RI) Carl I would not be too concerned about leakage. It ha; /archives//html/Amps/2017-05/msg00091.html (10,957 bytes)

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