Khron-Hite UHR-220 tube power supply - diyAudio
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Old 13th June 2011, 03:58 PM   #1
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Default Khron-Hite UHR-220 tube power supply

Hi

Does anyone have a schematic for a Khron-Hite UHR-220 tube power supply?
It works for about 10 minutes, then the voltage rises to about 250 V, and still varies.
I suspect the regulation feedback is opening somewhere and it's running full tilt.
I'm tired of poking around the multitude of components, testing the tubes, and resoldering what I can get at.

Thanks,
Bob
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Old 13th June 2011, 04:03 PM   #2
tomchr is offline tomchr  United States
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Manuals Plus: Find has several.

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Old 13th June 2011, 11:32 PM   #3
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Thanks, I know I can get a manual. I was hoping someone had a schematic. I'm not spending 30 bucks on a photocopy manual. I'll scrap it first.

Anyone have just the schematic so I can follow the components?

Thanks,
Bob
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Old 24th June 2011, 06:13 PM   #4
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Emailed Khron-Hite, and sales found the last manual they had and emailed it to me as a PDF. No charge.

That's what I call a great company.
If anyone would like it, let me know.
Bob.
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Old 17th July 2011, 09:48 AM   #5
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Interesting that Krohn-Hite still exists: I have two lab amplifiers (DCA50) from them, 1963.
Has regulated tube regulated (6AS7) supplies of + and - 260V, virtually no ripple, very high bandwidth (square wave response flat 0-100KHz is 200Vpp on 200 ohm) from this beast.
albert
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