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Old 19th December 2012, 03:36 PM   #1
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Default Aleph 3 psu

If building a Aleph 3 what would be the min or ideal transformer size ? I have a a Antek 400va 2 x 18v and hope this will work.
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Old 19th December 2012, 03:48 PM   #2
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I use that very transformer from antek for my Aleph 3 and it works like a charm. Go for it.
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Old 19th December 2012, 04:12 PM   #3
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yes. this transformer will work great. you can use f.ex a 600VA 2x18V, just to get the transformer temp down. but it's no need.
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Old 19th December 2012, 04:33 PM   #4
6L6 is offline 6L6  United States
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The rule of thumb is 6-10 times the amplifier's output in VA.

An Aleph 3 is 25wpc, stereo, totaling 50w.

50*6 = 300
50*10 = 500

Your 400VA transformer is right in the middle of this range, so it's perfect!
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Old 19th December 2012, 04:55 PM   #5
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or rather 2x dissipation as minimum. dissipation for aleph3 is 90W pr ch. so 180W. 400VA is right above minimun. but it will do.
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Old 19th December 2012, 05:27 PM   #6
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Thank-you everyone ! It seems I spend more time buying parts than building. Its been almost 3yrs looking at all the various options and I'm almost ready to construct my first amp... The Aleph-3 seems like the best choice for me, Again thanks people !
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Old 20th December 2012, 03:09 AM   #7
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Question Question

The transformer I speak of is the Antek # AS-4218 it is the shielded version. It has a drain wire to shield between windings where does it go ? Star ground or chassis ground ?
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Old 20th December 2012, 03:29 AM   #8
6L6 is offline 6L6  United States
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I have used one in an F5 and connected it to the chassis.
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