High voltage psu

Hojvaelde · 26th November 2006, 08:06 AM

Hello

I use some of my time at tube amplifiers and that is the reason I need a regulated power supply (transistors

).

Variable output voltage 100 - 350 (400) voltage
Current 100 mA. Short circuit protected

Schematic wanted.

Regards

Benny

korneluk · 26th November 2006, 08:33 AM

I do not have the schematics for these unit but the specs are very close to what you need.

Three simultaneous Outputs:

Main (B+): 0 to 400 volts DC, 100 mA continuous, 125 mA max intermittent

Bias (C-): 0 to -100 volts DC, 1 mA max

Filament (A): 6.3 volts AC, 4 amps max

B+ Regulation: output variation less than 1% from no load to full load, for outputs of 100 to 400 volts; output variation less than +/-1% for a +/-10 volt variation in the 117 volt AC input

B+ Ripple: less than 10 mV RMS ripple, jitter and noise

Find a schematic and you can build it yourself.

-- josé k.

the_manta · 26th November 2006, 09:16 AM

Hi !

Some german sites with very well working PSU's:

One with the LR8N3 Regulator.
http://www.roehrenkramladen.de/hboexp3/hboexp3.htm

And one with comparators:
http://www.jogis-roehrenbude.de/Lese.../250VNT_01.htm

Both work very well

Manta

astouffer · 26th November 2006, 03:31 PM

Sounds like you need a Heathkit IP-32 power supply, its specs are very similar.

ftp://bama.sbc.edu/downloads/heath/ip32/IP32_2.GIF

jackinnj · 26th November 2006, 04:41 PM

if you substitute a variable resistor for one of the fixed ones this works quite nicely -- uses the SuperTex LR8N3 HV regulator:

jackinnj · 26th November 2006, 04:43 PM

here's a schematic:

sklimek · 26th November 2006, 05:02 PM

Page 23 of Bas Horneman's latest DIYMAG shows a Texas Instr. TL783 schematic with a 400V regulated output.

http://www.diyaudio.com/forums/showt...25#post1060325

Stan

jackinnj · 26th November 2006, 06:07 PM

the TL783 is designed with a smaller range of input voltages than the LR8N3 -- you could effect the same result with an LM317 --just protect such that the input to output voltage is limited by the zener.

the supertex devices was designed as a supervisory circuit regulator for off-line SMPS -- just repurposed.

26th November 2006, 08:06 AM	#1
Hojvaelde diyAudio Member Join Date: Jan 2005 Location: Denmark	High voltage psu Hello I use some of my time at tube amplifiers and that is the reason I need a regulated power supply (transistors ). Variable output voltage 100 - 350 (400) voltage Current 100 mA. Short circuit protected Schematic wanted. Regards Benny

26th November 2006, 08:33 AM	#2
korneluk diyAudio Member Join Date: Jan 2005 Location: South Florida	Look for a Heathkit IP-32 I do not have the schematics for these unit but the specs are very close to what you need. Three simultaneous Outputs: Main (B+): 0 to 400 volts DC, 100 mA continuous, 125 mA max intermittent Bias (C-): 0 to -100 volts DC, 1 mA max Filament (A): 6.3 volts AC, 4 amps max B+ Regulation: output variation less than 1% from no load to full load, for outputs of 100 to 400 volts; output variation less than +/-1% for a +/-10 volt variation in the 117 volt AC input B+ Ripple: less than 10 mV RMS ripple, jitter and noise Find a schematic and you can build it yourself. -- josé k.

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26th November 2006, 09:16 AM	#3
the_manta diyAudio Member Join Date: Nov 2006 Location: Munich, Bavaria	Hi ! Some german sites with very well working PSU's: One with the LR8N3 Regulator. http://www.roehrenkramladen.de/hboexp3/hboexp3.htm And one with comparators: http://www.jogis-roehrenbude.de/Lese.../250VNT_01.htm Both work very well Manta

26th November 2006, 03:31 PM	#4
astouffer diyAudio Member Join Date: Jun 2004 Location: Pittsburgh, crumbling wasteland	Sounds like you need a Heathkit IP-32 power supply, its specs are very similar. ftp://bama.sbc.edu/downloads/heath/ip32/IP32_2.GIF

26th November 2006, 04:41 PM	#5
jackinnj diyAudio Member Join Date: Apr 2002 Location: Llanddewi Brefi, NJ	if you substitute a variable resistor for one of the fixed ones this works quite nicely -- uses the SuperTex LR8N3 HV regulator:

26th November 2006, 04:43 PM	#6
jackinnj diyAudio Member Join Date: Apr 2002 Location: Llanddewi Brefi, NJ	here's a schematic:

26th November 2006, 05:02 PM	#7
sklimek diyAudio Member Join Date: Oct 2004 Location: Arizona badlands	Page 23 of Bas Horneman's latest DIYMAG shows a Texas Instr. TL783 schematic with a 400V regulated output. http://www.diyaudio.com/forums/showt...25#post1060325 Stan

26th November 2006, 06:07 PM	#8
jackinnj diyAudio Member Join Date: Apr 2002 Location: Llanddewi Brefi, NJ	the TL783 is designed with a smaller range of input voltages than the LR8N3 -- you could effect the same result with an LM317 --just protect such that the input to output voltage is limited by the zener. the supertex devices was designed as a supervisory circuit regulator for off-line SMPS -- just repurposed.

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