How do i build a 12v power supply ?

onis_uk · 2nd August 2010, 08:47 PM

i need a 12v toroidal power supply no more than about 5 amps max, to power my valve preamp. how do i build one or is there somewhere i can buy one ??
cheers Dom

onis_uk · 08:54 PM

could i use this ???

Atilla · 2nd August 2010, 08:52 PM

Buying a 12V PSU should be both cheaper and easier than making your own. Get a standard double-insulated unit and enjoy. 12V is a standard value, they should be available pretty much everywhere.

onis_uk · 2nd August 2010, 08:54 PM

i know but i have read that those kind of power supply's will introduce noise into my valve preamp, i want the best possible sound quality

Atilla · 2nd August 2010, 08:59 PM

Just to be sure - you need AC or DC? What kind of preamp are we talking about here?

onis_uk · 2nd August 2010, 09:00 PM

240v ac in and 12v dc out i have a valve preamp made by arjen helder

multisync · 2nd August 2010, 09:17 PM

is this for the heaters only and you have the high voltage taken care of ?

Atilla · 2nd August 2010, 11:47 PM

There are good 12V supplies for charging batteries, laptops and driving some larger devices, that should be perfect for what you need. There are quite good ones and if it's heaters only, you shouldn't really worry at all.

onis_uk · 3rd August 2010, 04:58 PM

no this is to power the whole amp the amp provides its own hi voltages on board, you just need to feed it 12v dc !

alexmoose · 3rd August 2010, 05:02 PM

You could always use a computer power supply, that'll give you 12volts and more amps than you'd want

2nd August 2010, 08:47 PM	#1
onis_uk diyAudio Member Join Date: Jul 2004 Location: uk	How do i build a 12v power supply ? i need a 12v toroidal power supply no more than about 5 amps max, to power my valve preamp. how do i build one or is there somewhere i can buy one ?? cheers Dom

2nd August 2010, 08:52 PM	#2
onis_uk diyAudio Member Join Date: Jul 2004 Location: uk	could i use this ??? Last edited by onis_uk; 2nd August 2010 at 08:54 PM.

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2nd August 2010, 08:52 PM	#3
Atilla Soldering Gun Fanatic diyAudio Member Join Date: Jul 2008	Buying a 12V PSU should be both cheaper and easier than making your own. Get a standard double-insulated unit and enjoy. 12V is a standard value, they should be available pretty much everywhere.

2nd August 2010, 08:54 PM	#4
onis_uk diyAudio Member Join Date: Jul 2004 Location: uk	i know but i have read that those kind of power supply's will introduce noise into my valve preamp, i want the best possible sound quality

2nd August 2010, 08:59 PM	#5
Atilla Soldering Gun Fanatic diyAudio Member Join Date: Jul 2008	Just to be sure - you need AC or DC? What kind of preamp are we talking about here?

2nd August 2010, 09:00 PM	#6
onis_uk diyAudio Member Join Date: Jul 2004 Location: uk	240v ac in and 12v dc out i have a valve preamp made by arjen helder

2nd August 2010, 09:17 PM	#7
multisync diyAudio Member Join Date: Jan 2008 Location: Carp	is this for the heaters only and you have the high voltage taken care of ?

2nd August 2010, 11:47 PM	#8
Atilla Soldering Gun Fanatic diyAudio Member Join Date: Jul 2008	There are good 12V supplies for charging batteries, laptops and driving some larger devices, that should be perfect for what you need. There are quite good ones and if it's heaters only, you shouldn't really worry at all.

3rd August 2010, 04:58 PM	#9
onis_uk diyAudio Member Join Date: Jul 2004 Location: uk	no this is to power the whole amp the amp provides its own hi voltages on board, you just need to feed it 12v dc !

3rd August 2010, 05:02 PM	#10
alexmoose diyAudio Member Join Date: Mar 2006 Location: Michigan	You could always use a computer power supply, that'll give you 12volts and more amps than you'd want

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