Transform computer supply into 400V supply for tubes

vasko · 23rd May 2010, 10:22 PM

Is there project with complete schematics already done?

It also would be nice if it has pot for voltage adjust 50-400V if I'm not asking too much?

I want to drive guitar (pentodes and triodes) amp 50-100W with this.

Can you link me with such project?

bob91343 · 23rd May 2010, 10:53 PM

You might be asking too much. You probably will have to rewind the transformer for higher voltage and, if you do, you might find its resonant frequency too low for proper operation for a switching supply. Computer power supplies only produce 5V and 12V.

Think about the volts/microsecond you will need to run such a beast.

Pano · 23rd May 2010, 11:45 PM

Just a tiny bit of searching would have found you this:
HV SMPS for tube preamp
It's a start.
(please do search)

star882 · 24th May 2010, 01:05 AM

If you have an active PFC unit, the PFC section will supply roughly what you need. No isolation but it's cheaper to isolate the signal and isolation doesn't offer much safety at high voltages.

vasko · 25th May 2010, 09:53 AM

I did a search but there is no schematic.

I want something like this,but there's no schematic included in this project.

Silicon Chip Online - Regulated High-Voltage Supply For Valve Amplifiers

23rd May 2010, 10:22 PM	#1
vasko diyAudio Member Join Date: May 2010	Transform computer supply into 400V supply for tubes Is there project with complete schematics already done? It also would be nice if it has pot for voltage adjust 50-400V if I'm not asking too much? I want to drive guitar (pentodes and triodes) amp 50-100W with this. Can you link me with such project?

24th May 2010, 01:05 AM	#4
star882 diyAudio Member Join Date: Mar 2007	If you have an active PFC unit, the PFC section will supply roughly what you need. No isolation but it's cheaper to isolate the signal and isolation doesn't offer much safety at high voltages. __________________ "Fully on MOSFET = closed switch, Fully off MOSFET = open switch, Half on MOSFET = poor imitation of Tiffany Yep." - also applies to IGBTs!

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23rd May 2010, 10:53 PM	#2
bob91343 diyAudio Member Join Date: Mar 2010	You might be asking too much. You probably will have to rewind the transformer for higher voltage and, if you do, you might find its resonant frequency too low for proper operation for a switching supply. Computer power supplies only produce 5V and 12V. Think about the volts/microsecond you will need to run such a beast.

23rd May 2010, 11:45 PM	#3
Pano diyAudio Moderator Join Date: Oct 2004 Location: North Carolina Blog Entries: 4	Just a tiny bit of searching would have found you this: HV SMPS for tube preamp It's a start. (please do search)

25th May 2010, 09:53 AM	#5
vasko diyAudio Member Join Date: May 2010	I did a search but there is no schematic. I want something like this,but there's no schematic included in this project. Silicon Chip Online - Regulated High-Voltage Supply For Valve Amplifiers

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