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Total 7 documents matching your query.

1. [Amps] 4pr1000 heater voltage? (score: 1): Author: davek at medphys.ucl.ac.uk (Dr. David Kirkby); Date: Tue May 6 09:57:30 2003; I think the tolerance is normally +/- 5% (that should be on the data sheet), so the answer is yes. You can easily add an external resistor in series with the heater. I don't know what the heater curr; /archives//html/Amps/2003-05/msg00048.html (8,632 bytes)
2. [Amps] 4pr1000 heater voltage? (score: 1): Author: gdaught6 at Stanford.edu (gdaught6@Stanford.edu); Date: Wed May 7 08:21:35 2003; BAD GUESS!! It's more like 21 amperes! Yes. 73, George T. Daughters, K6GT; /archives//html/Amps/2003-05/msg00051.html (7,067 bytes)
3. [Amps] 4pr1000 heater voltage? (score: 1): Author: philk5pc at tyler.net (Phil Clements); Date: Wed May 7 08:21:40 2003; I use the old Henry trick of installing a 10 ohm slider type power resistor in the primary of the filament transformer. (25 or 50 watts, as required) The proper voltage can be set at the tube pins b; /archives//html/Amps/2003-05/msg00053.html (7,255 bytes)
4. [Amps] 4pr1000 heater voltage? (score: 1): Author: gd0tep at manx.net (gd0tep); Date: Mon Apr 21 09:05:36 2003; Hi, My specs say that the 4pr1000 tube needs 7.5v for the heaters, I've got a transformer from Dhal, but on testing the voltage with the tube in the deck I see I'm getting about 8.3v Is this to high?; /archives//html/Amps/2003-04/msg00198.html (7,083 bytes)
5. [Amps] 4pr1000 heater voltage? (score: 1): Author: 2 at vc.net (2); Date: Mon Apr 21 16:40:03 2003; ? ... not for those who have a free supply of 4PR1000As. For those who don't, 7.2v is mo' betta. -- The math: Since relative emissive life of a thoriated tungsten cathode is (E1/E2)^23.4, 8.3v/7.2v^; /archives//html/Amps/2003-04/msg00204.html (6,817 bytes)
6. [Amps] 4pr1000 heater voltage? (score: 1): Author: gd0tep at manx.net (gd0tep); Date: Sun Apr 27 09:54:28 2003; Thanks to all who replied regarding the heater voltage on my 4pr1000 Due to the various resistors I had sitting around here, I've settled for it at 7v. All I have to do now is try the HT, then a litt; /archives//html/Amps/2003-04/msg00214.html (6,529 bytes)
7. [Amps] 4pr1000 heater voltage? (score: 1): Author: 2 at vc.net (2); Date: Mon Apr 28 09:01:26 2003; Andy -- According to Econco Broadcast Services, one method of determining optimal filament potential is to tune up the amplifier for max pep @ max drive at the nominal filament V, then adjust the fil; /archives//html/Amps/2003-04/msg00220.html (7,269 bytes)

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