Mail Archive Search: <+subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[AMPS\]\s+8877\s+bad\s+date\s+codes\s*$/>

Results:

References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[AMPS\]\s+8877\s+bad\s+date\s+codes\s*$/: 9 ]

Total 9 documents matching your query.

1. [AMPS] 8877 bad date codes (score: 1): Author: amps@txrx.demon.co.uk (Steve Thompson); Date: Mon, 2 Aug 1999 07:01:47 +0100; How do problems with these tubes show up when you use them? Steve -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contestin; /archives//html/Amps/1999-08/msg00016.html (7,135 bytes)
2. [AMPS] 8877 bad date codes (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Mon, 2 Aug 1999 10:53:29 -0500; They will fail in a relatively short time. (((73))) Phil, K5PC -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.; /archives//html/Amps/1999-08/msg00028.html (7,194 bytes)
3. [AMPS] 8877 bad date codes (score: 1): Author: w6ru@lightspeed.net (Terry Gaiser); Date: Mon, 2 Aug 1999 10:32:29 -0700; The problem I observed is that they develop filament to cathode shorts ... sometimes during the warm-up cycle sometimes all the time after warm-up ... this shows up as idling plate current while in s; /archives//html/Amps/1999-08/msg00038.html (8,325 bytes)
4. [AMPS] 8877 bad date codes (score: 1): Author: agray@voicenet.com (Alan Gray); Date: Mon, 2 Aug 1999 16:33:17 -0400; That's been my experience too. The defective tubes often take as much as 100 hours of operation before they start to show a problem. Alan, W3BV --Original Message-- From: Terry Gaiser <w6ru@lightspee; /archives//html/Amps/1999-08/msg00043.html (9,508 bytes)
5. [AMPS] 8877 bad date codes (score: 1): Author: amps@txrx.demon.co.uk (Steve Thompson); Date: Tue, 3 Aug 1999 07:27:56 +0100; Thanks for the comments, guys. If tubes survive the few 100s hours, are they then ok, or still prone to fail? In other words, if I have a pull from working equipment with a bad date code on it, is it; /archives//html/Amps/1999-08/msg00058.html (7,300 bytes)
6. [AMPS] 8877 bad date codes (score: 1): Author: amps@txrx.demon.co.uk (Steve Thompson); Date: Tue, 3 Aug 1999 07:30:12 +0100; Thanks for the comments, guys. If tubes survive the few 100s hours or 100s heater cycles, are they then ok, or still prone to fail? In other words, if I have a pull from working equipment with a bad; /archives//html/Amps/1999-08/msg00059.html (7,326 bytes)
7. [Amps] 8877 bad date codes (score: 1): Author: "Gary Schafer" <garyschafer@comcast.net>; Date: Fri, 15 Jan 2010 15:38:24 -0500; Does anyone know what years (date codes) to avoid on the 8877? I have seen 8609 - 8905. Thanks Gary K4FMX _______________________________________________ Amps mailing list Amps@contesting.com http://; /archives//html/Amps/2010-01/msg00210.html (6,481 bytes)
8. Re: [Amps] 8877 bad date codes (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Fri, 15 Jan 2010 16:46:32 -0500; There are also the early tubes that had much higher gain and Eimac did a redesign. I have a 79 code that was removed from an Alpha 77 that would smack a 2500W slug with around 50W drive. Owners were; /archives//html/Amps/2010-01/msg00211.html (7,350 bytes)
9. Re: [Amps] 8877 bad date codes (score: 1): Author: Roger <sub1@rogerhalstead.com>; Date: Fri, 15 Jan 2010 18:12:55 -0500; Those are the ones I'd want. Just remember to keep the proper drive level.<:-)) Depends on where the parasite was located. 73 Roger (K8RI) _______________________________________________ Amps mailing; /archives//html/Amps/2010-01/msg00213.html (8,376 bytes)

Current List: 1 - 9
Page: [1]