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1. [AMPS] Fil voltage al-1200 (score: 1): Author: w2ge@home.com (Phil Levin W2GE); Date: Tue, 08 Feb 2000 10:36:58 -0500; I checked my voltage at the outlet for my amp. and it measured 235 volts. This was measured with a B&K 20k ohm voltmeter. Factory setting for the AL-1200 filament xfmr line voltage is setup for 245v.; /archives//html/Amps/2000-02/msg00121.html (7,795 bytes)
2. [AMPS] Fil voltage al-1200 (score: 1): Author: measures@vcnet.com (measures); Date: Tue, 8 Feb 2000 07:52:26 -0700; The critical thing is filament v at the filament pins. For max. tube life, the low end of the rated v range is best. - Rich..., 805.386.3734, www.vcnet.com/measures. -- FAQ on WWW: http://www.contes; /archives//html/Amps/2000-02/msg00123.html (8,096 bytes)
3. [AMPS] Fil voltage al-1200 (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Tue, 8 Feb 2000 10:50:14 -0600; The filament voltage must be measured at the tube sockets in order to set the taps properly. There is an exponential increase in tube life when the voltage is set slightly below specs. At +/- $600 p; /archives//html/Amps/2000-02/msg00125.html (8,932 bytes)
4. [AMPS] Fil voltage al-1200 (score: 1): Author: measures@vcnet.com (measures); Date: Tue, 8 Feb 2000 11:04:10 -0700; the resistor cold true -- but a cold heater does not. See below but Eimac does not say anything about limiting the startup current to the 8877 heater. While it is true that directly-heated cathode t; /archives//html/Amps/2000-02/msg00131.html (9,045 bytes)
5. [AMPS] Fil voltage al-1200 (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Tue, 8 Feb 2000 13:23:55 -0600; . The question was about a 3CX1200A7, I thought. Measurements have shown that inrush on the heater of this series tube can exceed the limit, especially if the filament transformer is more robust than; /archives//html/Amps/2000-02/msg00132.html (8,784 bytes)
6. [AMPS] Fil voltage al-1200 (score: 1): Author: measures@vcnet.com (measures); Date: Tue, 8 Feb 2000 13:36:17 -0700; There is no stated inrush limit for the 3CX1200A7 filament.. The 3CX1200A7 does not have a heater. True. I use a 75w reflector flood bulb over my kitchen table. Before I put an inrush current limite; /archives//html/Amps/2000-02/msg00133.html (9,431 bytes)
7. [AMPS] Fil voltage al-1200 (score: 1): Author: Wt8r@aol.com (Wt8r@aol.com); Date: Tue, 8 Feb 2000 19:34:18 EST; Rich, I thought all thermionic vacuum tubes had heaters of some sort, even if they were called filaments. Dave in Dayton, WT8R -- FAQ on WWW: http://www.contesting.com/ampsfaq.html Submissions: amps@; /archives//html/Amps/2000-02/msg00136.html (8,102 bytes)
8. [AMPS] Fil voltage al-1200 (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Tue, 8 Feb 2000 19:26:32 -0600; Now, now, you guys have got to cut Rich some slack! It is just his way of not wanting to cut me any slack on filament/heater (I want to be technically correct, here) inrush. The "bible," (Eimac data; /archives//html/Amps/2000-02/msg00138.html (8,969 bytes)
9. [AMPS] Fil voltage al-1200 (score: 1): Author: measures@vcnet.com (measures); Date: Tue, 8 Feb 2000 19:52:58 -0700; Eimac uses the term ''heater'' in conjunction with the heat source for oxide-cathodes. They do not use the term ''heater'' in conjunction with thoriated tungsten/directly filaments . later, Dave - R; /archives//html/Amps/2000-02/msg00140.html (8,478 bytes)
10. [AMPS] Fil voltage al-1200 (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Wed, 09 Feb 2000 08:55:50 -0500; I can't parse amps with you guys, but English is another story -- a moot point is one that doesn't matter. The point of Rich's maneuver is to avoid admitting he /ever/ makes a mistake. 73, Pete N4ZR; /archives//html/Amps/2000-02/msg00149.html (8,193 bytes)
11. [AMPS] Fil voltage al-1200 (score: 1): Author: measures@vcnet.com (measures); Date: Wed, 9 Feb 2000 10:16:51 -0700; ? What does Eimac say, Pete? thanks Methinks Rich makes plenty of mistakes. An example was when I received the invitation to write the amplifiers chapter for the 1995 Handbook. My gut feeling was th; /archives//html/Amps/2000-02/msg00152.html (10,604 bytes)

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