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Dynaco-Doctor Forum Welcome! Need support, you got it. Or share your ideas and experiences. |
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Dynaco-Doctor Forum Welcome! Need support, you got it. Or share your ideas and experiences. |
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I was looking around for the filament current rating on the 6.3v taps of the PA-060 power transformer, and I read somewhere that it is 3a, but that the upgrade transformers available are 5a to give some headroom and to run cooler. But just looking at the data sheets for the EL34 and 7199, the total draw is 3.45a, which exceeds the 3a spec. Is that spec incorrect? Or how did it get away with it in an original ST-70?
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Topic - PA060 filament current? - zacster 07:20:09 03/22/20 (15)
- RE: PA060 filament current? - understudy 06:30:48 01/18/24 (0)
- There were a minimum of three different power transformers... - viridian 07:21:56 04/28/20 (3)
- RE: There were a minimum of three different power transformers... - Mushroom Soup 18:41:34 03/05/21 (0)
- RE: There were a minimum of three different power transformers... - zacster 09:14:27 04/28/20 (1)
- Best of luck with that. Nt - viridian 09:54:53 04/28/20 (0)
- "I read somewhere that it is 3a" - 1973shovel 06:01:27 03/27/20 (9)
- RE: "I read somewhere that it is 3a" - zacster 06:58:44 03/27/20 (8)
- "a 4 tube driver board" - 1973shovel 08:10:43 03/27/20 (7)
- RE: "a 4 tube driver board" - zacster 10:55:59 03/27/20 (6)
- "Is that the story?" - 1973shovel 06:56:45 03/28/20 (5)
- RE: "Is that the story?" - zacster 18:10:32 03/28/20 (4)
- Nearly five years for Joe - 1973shovel 06:28:06 03/30/20 (3)
- RE: Nearly five years for Joe - understudy 06:23:02 01/18/24 (2)
- Yes, weird...and short. Enjoy it while we can! (nt) - 1973shovel 07:52:20 01/18/24 (1)
- RE: Yes, weird...and short. Enjoy it while we can! (nt) - understudy 09:13:06 01/18/24 (0)
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