A good tube amplifier power supply

Jean-Paul_2 · 11th June 2009, 05:47 PM

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).

analog_sa · 11th June 2009, 06:09 PM

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?

Jean-Paul_2 · 11th June 2009, 06:22 PM

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.

Bitrex · 11th June 2009, 07:11 PM

Anyone know what a 100,000uF 450V capacitor costs?

Jean-Paul_2 · 11th June 2009, 07:19 PM

hey bitrex,

you need goggles!

100000µF/16V!!!!!

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

A good investment for a great sounding amplifier

Bitrex · 11th June 2009, 07:33 PM

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!

DHT112A · 11th June 2009, 07:35 PM

C105 reads 100,000uf @ 450V to me

Jean-Paul_2 · 11th June 2009, 07:39 PM

Hi Bitrex,

UNITED CHEMI-CON ESMH160VSN104MA80T

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

15,90€

Jean-Paul_2 · 11th June 2009, 07:42 PM

ok guys,

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

VISHAY BC COMPONENTS 2222 159 57471.

asap!

Jean-Paul_2 · 11th June 2009, 07:44 PM

Hi Bitrex,

i don´t need goggles, I need a dog! I am blind!

sorry

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11th June 2009, 06:09 PM	#2
analog_sa diyAudio Member Join Date: Aug 2002 Location: Sofia	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?

11th June 2009, 06:22 PM	#3
Jean-Paul_2 diyAudio Member Join Date: May 2007	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.

11th June 2009, 07:11 PM	#4
Bitrex diyAudio Member Join Date: Jan 2009	Anyone know what a 100,000uF 450V capacitor costs?

11th June 2009, 07:19 PM	#5
Jean-Paul_2 diyAudio Member Join Date: May 2007	hey bitrex, you need goggles! 100000µF/16V!!!!! But in my 845 SE the capacitors are 1000µF/1000V = 100€! A good investment for a great sounding amplifier

11th June 2009, 07:33 PM	#6
Bitrex diyAudio Member Join Date: Jan 2009	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!

11th June 2009, 07:35 PM	#7
DHT112A diyAudio Member Join Date: Jun 2005 Location: Tacoma , WA	C105 reads 100,000uf @ 450V to me

11th June 2009, 07:39 PM	#8
Jean-Paul_2 diyAudio Member Join Date: May 2007	Hi Bitrex, UNITED CHEMI-CON ESMH160VSN104MA80T http://de.farnell.com/jsp/search/pro...questid=649756 15,90€

11th June 2009, 07:42 PM	#9
Jean-Paul_2 diyAudio Member Join Date: May 2007	ok guys, I will change the value for C105 470µF/450V. VISHAY BC COMPONENTS 2222 159 57471. asap!

11th June 2009, 07:44 PM	#10
Jean-Paul_2 diyAudio Member Join Date: May 2007	Hi Bitrex, i don´t need goggles, I need a dog! I am blind! sorry

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