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Old 16th August 2005, 08:06 PM   #1
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Default aleph 5

Goodevening.
I.ve got a problem with my aleph 5. I build it up, got 12v from the + and 12v from the - from the bridgerectifier to two mono psu's, with each 2 BC47000 uF elco's, from the left I got at the + 9,5v
at the - 24v, from the right channel i got at the + 2,6v and at the -32,8v. Not anything from + - 34v, so what is happening? I got 2 tranny's from 300VA 2x25volt.
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Old 16th August 2005, 08:11 PM   #2
Netlist is offline Netlist  Belgium
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Are these measurements with PSU connected to the amp or floating? Could you post your wiring diagram?

/Hugo
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Old 17th August 2005, 12:24 AM   #3
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He Hugo thanks for replying!
I am going to bed and will reply tomorrow.
Good night Teake.
I.am not that good in this so it will be difficult to tell you wat I did.
I have two bridgerectifiers and have taken the wires with the same colors together from the trannies, putting two on the left and two on the right on the rectifier. The two elkos per channel I took the + to the rectifierbridge and the - ,and between them i have taken a little copper bridge connected between the + and - , solderded a connector on it with a wire to floating ground. It lookes like the one PedroPo used in his aleph5
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Old 17th August 2005, 07:19 AM   #4
Netlist is offline Netlist  Belgium
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Please edit the picture as to get a better idea.
MSPaint will do nicely.

/Hugo
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Old 17th August 2005, 12:58 PM   #5
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Default aleph5 psu

Hello!
2 trannys, 300VA 2x25v 6A, with each 2 primary wires to main and 4 secundairies, red, yellow, grey and blue. I connected the 4. so i got 2 red, 2 yellow, 2 grey and 2 blue, to the rectifiers ac points. The rectifiers are 25A/400V. Than i connected + and - from the rectifier to the elko's and a wire to ground from both seperate psu's. On the 4 elko's i got on each of them a solen bypass capacitor from 1.00uFJ, 400v.
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Old 17th August 2005, 01:03 PM   #6
Magura is offline Magura  Denmark
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The easy solution, use a bridge rectifier per secondary.

Magura
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Old 17th August 2005, 02:12 PM   #7
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Thanks Magura
So I need 4 bridgerectifiers instead of 2, but I only can get 35A/600v here in my town can I put them next to my other rectifiers, or do I by 4 35A/600 and what will be the best. Thanks Teake.
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Old 17th August 2005, 02:44 PM   #8
rchua77 is offline rchua77  Singapore
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Quote:
Originally posted by intense-tavda
Thanks Magura
So I need 4 bridgerectifiers instead of 2, but I only can get 35A/600v here in my town can I put them next to my other rectifiers, or do I by 4 35A/600 and what will be the best. Thanks Teake.

All 4 of the same kind would be nice but not necessary. Attached is how you should wire them up. Couldnt really see you pic.
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Old 17th August 2005, 03:34 PM   #9
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Hi,

Just to be complete, I added a picture to make two mono supplies using two bridges.

I have to say I myself would use four bridges, although this picture is a double power supply from the original from Mr. Pass himself, and I did not hear any difference between two bridges and one in my Aleph 5.

If you are planning to use only four capacitors, you could also think about using a CLC solution, with two secondaries parallel, but you would loose the mono aspect.

Remember, 4 bridges generate a lot of heat, so take care how to mount them!

Greetings, Harry.
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Old 17th August 2005, 04:44 PM   #10
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Is this for one channel?
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