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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[AMPS\]\s+failure\s*$/: 8 ]

Total 8 documents matching your query.

1. [AMPS] failure (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Tue, 17 Jun 1997 15:04:00 +0100; filament enough I think the 8122 has a cathode rather than a filament, so my guess is that it drew a lot of current while the cathode cooled down, which takes some time. I suppose its possible that i; /archives//html/Amps/1997-06/msg00249.html (7,891 bytes)
2. [AMPS] failure (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Tue, 17 Jun 1997 17:03:00 +0100; Even with bias, you don't want to have screen volts without plate volts. I know of an old (now) military tx which had a 5894 driving a pair of 4-250As. The plate voltage for the 5894 was the screen f; /archives//html/Amps/1997-06/msg00252.html (8,374 bytes)
3. [AMPS] failure (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Wed, 18 Jun 1997 11:09:36 +0000; To: <amps@contesting.com> Hi Pete, Don't bet more than a beer on that! The main heating of tube elements (other than the filament) is by kinetic energy from electrons. Since the electrons are leavin; /archives//html/Amps/1997-06/msg00261.html (9,443 bytes)
4. [AMPS] failure (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Wed, 18 Jun 1997 16:25:00 +0100; Tom Something at the back of my mind says that I've seen somewhere that one shouldn't run a thoriated filament in saturation, but I can't remember why - the penalty of getting old, I guess. If you ru; /archives//html/Amps/1997-06/msg00263.html (7,973 bytes)
5. [AMPS] failure (score: 1): Author: measures@vc.net (Rich Measures); Date: Wed, 18 Jun 97 08:48:40 -0700; To: <amps@contesting.com> ..........snip..... Cathode stripping seems quite likely. This problem can be avoided by designing the amplifier so that when the heater voltage drops just below the rated; /archives//html/Amps/1997-06/msg00264.html (8,243 bytes)
6. [AMPS] failure (score: 1): Author: yo3ctk@alltrom.ro (yo3ctk); Date: Wed, 18 Jun 1997 19:39:17 +0300; This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. -- =_NextPart_001_01BC7C1F.51B13690 Content-Type: text/plain; c; /archives//html/Amps/1997-06/msg00266.html (18,596 bytes)
7. [AMPS] failure (score: 1): Author: measures@vc.net (Rich Measures); Date: Wed, 18 Jun 97 14:37:26 -0700; ... ... The c. 1.5% thorium content of the tungsten filament remains unchanged. However, run the filament too hot and the emissive tungsten carbide layer gives up it's carbon atoms at an accelerated; /archives//html/Amps/1997-06/msg00269.html (8,518 bytes)
8. [AMPS] failure (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Wed, 18 Jun 1997 23:18:57 +0000; To: <amps@contesting.com> Hi Peter, Everything I've read indicates no damage occurs to a thoriated tungsten emitter from attempts to run excessive current. The emission simply stops increasing. For; /archives//html/Amps/1997-06/msg00272.html (8,827 bytes)

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