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Total 6 documents matching your query.

1. [Amps] 8877 filament. (score: 1): Author: MU 4CX250B <4cx250b@miamioh.edu>; Date: Thu, 4 May 2017 12:21:09 -0600; The 8877 is a fabulous tube, but there are times when the warmup delay seems like an eternity. I wonder how much the warmup delay would be shortened if the filament was run at, say, 3 V on a 24/7 ba; /archives//html/Amps/2017-05/msg00054.html (7,236 bytes)
2. Re: [Amps] 8877 filament. (score: 1): Author: "Randall, Randy" <Randy.Randall@UCHealth.com>; Date: Thu, 4 May 2017 18:46:44 +0000; That scheme was tried in TV's and consumer radios in the 60's and 70's and called an instant on feature. The series string filaments were run through a diode when the set was "off" and the diode shor; /archives//html/Amps/2017-05/msg00055.html (8,528 bytes)
3. Re: [Amps] 8877 filament. (score: 1): Author: Bill Turner <dezrat@outlook.com>; Date: Thu, 4 May 2017 20:24:38 +0000; -- ORIGINAL MESSAGE --(may be snipped) REPLY: I disagree in the case of TV tubes. I did TV repair for 20 years back in the 50's through the 70's and saw no evidence of tube life being reduced due to; /archives//html/Amps/2017-05/msg00056.html (7,364 bytes)
4. Re: [Amps] 8877 filament. (score: 1): Author: Ron Youvan <ka4inm@gmail.com>; Date: Thu, 4 May 2017 18:34:34 -0400; That scheme was tried in TV's and consumer radios in the 60's and 70's and called an instant on feature. The series string filaments were run through a diode when the set was "off" and the diode sho; /archives//html/Amps/2017-05/msg00057.html (8,227 bytes)
5. Re: [Amps] 8877 filament. (score: 1): Author: Thomas Walsh <w2co@comcast.net>; Date: Thu, 4 May 2017 18:17:48 -0600; And the blower would still need to be on as well, to keep from heat damaging the tube, it will still get hot. Never power a filament with no forced air! Even reduced filament voltage.. Sent from my i; /archives//html/Amps/2017-05/msg00060.html (7,299 bytes)
6. Re: [Amps] 8877 filament. (score: 1): Author: "Jim W7RY" <jimw7ry@gmail.com>; Date: Thu, 4 May 2017 20:14:53 -0500; I believe you missed a turn in the road Randy... 73 Jim W7RY --Original Message-- From: Thomas Walsh Sent: Thursday, May 04, 2017 7:17 PM To: Randall, Randy Cc: Jim Thomson ; amps@contesting.com Subj; /archives//html/Amps/2017-05/msg00061.html (8,291 bytes)

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