High voltage psu

[Hojvaelde]

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]

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.

 

[the_manta]

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/Leserbriefe/HPV-Netzteil/250VNT_01.htm

Both work very well

Manta

 

[astouffer]

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]

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

An externally hosted image should be here but it was not working when we last tested it.

 

[jackinnj]

here's a schematic:

An externally hosted image should be here but it was not working when we last tested it.

 

[sklimek]

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

http://www.diyaudio.com/forums/showthread.php?postid=1060325#post1060325

Stan

 

[jackinnj]

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.