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Old 11th June 2009, 05:47 PM   #1
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Default A good tube amplifier power supply

The most important design consideration before starting to build a tube amplifier is the fact that the quality of the power supplies is critical.

Here my schematics for a very good design published in the french electronic magazine LED.

R105 and R102 vor 30V between V105 and V121.

R111 - R113 with 5mA for the output voltage: fine adjust with R109.

For preamplifier, amplifier (>500VDC).
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Old 11th June 2009, 06:09 PM   #2
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Maybe you can throw some light on the design as it looks a bit mysterious as is.

Why such a small value for C107? Battery power for the reference? A 2SK30?
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Old 11th June 2009, 06:22 PM   #3
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Hello analog_sa,

reference is batterie: I use RC-batteries +7,2VDC in the latest design

I will scan the LED article and try to translate this weekend this french article.
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Old 11th June 2009, 07:11 PM   #4
Bitrex is offline Bitrex  United States
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Anyone know what a 100,000uF 450V capacitor costs?
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Old 11th June 2009, 07:19 PM   #5
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hey bitrex,

you need goggles!

100000F/16V!!!!!

But in my 845 SE the capacitors are 1000F/1000V = 100!

A good investment for a great sounding amplifier
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Old 11th June 2009, 07:33 PM   #6
Bitrex is offline Bitrex  United States
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C105 looks like it's listed as 100,000uF too on the schematic, unless I'm hallucinating, which is a distinct possibility. I'm thinking of that capacitor board I saw posted somewhere here with like 500 panasonic caps on it!
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Old 11th June 2009, 07:35 PM   #7
DHT112A is offline DHT112A  United States
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C105 reads 100,000uf @ 450V to me
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Old 11th June 2009, 07:39 PM   #8
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Hi Bitrex,

UNITED CHEMI-CON ESMH160VSN104MA80T

http://de.farnell.com/jsp/search/pro...questid=649756

15,90
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Old 11th June 2009, 07:42 PM   #9
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ok guys,

I will change the value for C105 470F/450V.

VISHAY BC COMPONENTS 2222 159 57471.

asap!
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Old 11th June 2009, 07:44 PM   #10
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Hi Bitrex,

i dont need goggles, I need a dog! I am blind!

sorry
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