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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: Several PS design questions posted by myles on February 4, 2006 at 05:17:14:
Hi, Myles,The power supply for DarkMœb was an adaptation of his existing transformer as well, and I was doing gymnastics to get his B+ voltage down to the 440v screen rating of the 7591. It looks to me like you'll get 375-380VDC from your transformer with a vacuum rectified supply, or about 400VDC from sand rectifiers; that's actually a better operating point for the 7591 anyway. The 7591, like the 7355, was developed for late model econo-receivers, where they would operate them at very high volts on the plate, substantially lowered screen volts, and very low current; this to maximize the advertised power rating of the amp while staying inside the plate dissipation rating of the device. If you look at the example circuits in the manuals, they were almost in class B.
What kind of power transformer do you have? You say it has a high voltage center-tapped HV secondary; does it have a 5v winding on it for a vacuum rectifier?
Aloha,
Poinz
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Follow Ups
- Re: Several PS design questions - Poindexter 10:13:19 02/04/06 (5)
- Has 2x 5v and 3 x6.3. so I should use 328v winding?(nt) - myles 10:29:39 02/04/06 (4)
- Whoops ignore that prior msg. read this one - myles 10:36:56 02/04/06 (3)
- Choices, choices. - Poindexter 13:06:03 02/04/06 (2)
- This one'll get built. I'll let u know how it goes (nt) - myles 13:48:23 02/04/06 (1)
- Yah, sure, sure. - Poindexter 19:26:36 02/04/06 (0)
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