toroid for Aleph 3

diy student · 5th September 2001, 06:25 PM

I'm about to build an Aleph 3. I saw that the power rating for the amp is 250 watts. and that the PSU supplies a +/- 25 at the output. What size transformer will work for the project and what should the secondary outputs be?

Freddie · 5th September 2001, 08:27 PM

Since the amp draws 250W I wouldn't use a transformer rated less than 500VA...

/Freddie

Nelson Pass · 5th September 2001, 10:53 PM

twin 18 volt secondaries will do a nice job,
and the 500 VA figure is correct.

cp642 · 16th September 2001, 04:33 PM

Was browsing thru the schematics the other day, was wondering what the SRC and the OUT terminal's for?

Koy · 16th September 2001, 10:00 PM

I use 500VA toroid - cca 2x23V/5A DC.

Nelson Pass · 17th September 2001, 09:09 PM

SRC designates the connection to the Source outputs
of the current source on the positive side, and OUT
is the actual output to the speaker. They are separated
by a small amount of resistance.

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5th September 2001, 06:25 PM	#1
diy student diyAudio Member Join Date: Aug 2001 Location: Indiana	I'm about to build an Aleph 3. I saw that the power rating for the amp is 250 watts. and that the PSU supplies a +/- 25 at the output. What size transformer will work for the project and what should the secondary outputs be?

5th September 2001, 08:27 PM	#2
Freddie diyAudio Member Join Date: Oct 2000 Location: Sweden	Since the amp draws 250W I wouldn't use a transformer rated less than 500VA... /Freddie

5th September 2001, 10:53 PM	#3
Nelson Pass The one and only Join Date: Mar 2001	twin 18 volt secondaries will do a nice job, and the 500 VA figure is correct.

16th September 2001, 04:33 PM	#4
cp642 diyAudio Member Join Date: Aug 2001	Was browsing thru the schematics the other day, was wondering what the SRC and the OUT terminal's for?

16th September 2001, 10:00 PM	#5
Koy diyAudio Member Join Date: Jan 2001 Location: Zlin	I use 500VA toroid - cca 2x23V/5A DC.

17th September 2001, 09:09 PM	#6
Nelson Pass The one and only Join Date: Mar 2001	SRC designates the connection to the Source outputs of the current source on the positive side, and OUT is the actual output to the speaker. They are separated by a small amount of resistance.