ACA with Universal Power Supply

bnorrish · 23rd November 2012, 09:51 PM

I was considering putting my ACAs in a proper chassis and replacing the laptop power supply to supply the 19v DC. I was considering using the Universal Power Supply from the DIY store. Any advice on how to make this work? What would be the recommended transformer to use? Any modification of parts needed on the PSU to make this work?

ACA sounds great! Thanks

6L6 · 23rd November 2012, 10:41 PM

It's not really the right board to use... The DIY audio board is a bipolar supply, and the ACA needs a single supply.

Something like Peter Daniel's PCB would be better -- Universal Power Supply PCB

One side of his board is all you need.

A 100-200va 14 or 15v transformer, Diodes, a pair of 30,000uf 25v caps and a handful of .47ohm 3W resistors will make essentially half of a Firstwatt -style PSU.

Samuel Jayaraj · 24th November 2012, 03:31 PM

Quote:

Originally Posted by 6L6

A 100-200va 14 or 15v transformer....

For mono or enough for stereo?

JRKO · 24th November 2012, 04:09 PM

A pair can run on a single 19V smps power supply so I'd say stereo is ok

bnorrish · 24th November 2012, 09:58 PM

Talking with 6L6 offline - adding up the cost of a transformer, psu and chassis and - I think I will keep the Amp Camp Amp as is and build an F-5!

23rd November 2012, 09:51 PM	#1
bnorrish diyAudio Member Join Date: Oct 2012 Location: Boston	ACA with Universal Power Supply I was considering putting my ACAs in a proper chassis and replacing the laptop power supply to supply the 19v DC. I was considering using the Universal Power Supply from the DIY store. Any advice on how to make this work? What would be the recommended transformer to use? Any modification of parts needed on the PSU to make this work? ACA sounds great! Thanks

23rd November 2012, 10:41 PM	#2
6L6 diyAudio Member Join Date: Oct 2010 Location: Denver, Colorado	It's not really the right board to use... The DIY audio board is a bipolar supply, and the ACA needs a single supply. Something like Peter Daniel's PCB would be better -- Universal Power Supply PCB One side of his board is all you need. A 100-200va 14 or 15v transformer, Diodes, a pair of 30,000uf 25v caps and a handful of .47ohm 3W resistors will make essentially half of a Firstwatt -style PSU. __________________ llustrated Build Guides - Pass Pearl 1 - Pass B1 - - Pass F5 - Pearl 2 - -O2 HPA - - Pass F4

24th November 2012, 04:09 PM	#4
JRKO diyAudio Member Join Date: Dec 2003 Location: U.K.	A pair can run on a single 19V smps power supply so I'd say stereo is ok __________________ In the interests of full disclosure JRKO = James Rupert Kingsley Osborne. And yes, my parents will pay for it when I choose their retirement home

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24th November 2012, 09:58 PM	#5
bnorrish diyAudio Member Join Date: Oct 2012 Location: Boston	Talking with 6L6 offline - adding up the cost of a transformer, psu and chassis and - I think I will keep the Amp Camp Amp as is and build an F-5!

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