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Old 22nd December 2002, 11:38 PM   #21
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This link has some 33,000 @ 50 V for $8 each.
http://www.brigarelectronics.com/
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Old 22nd December 2002, 11:43 PM   #22
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They do not have to be very close. The real Aleph 2's have 4 x 25,000 uf caps per monoblock. Most clone builders are using at least this much and adding inductors to make a pi filter. 4 x 33,000 uf and 2 x 2 - 4 mh inductors would work fine.
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Old 23rd December 2002, 03:39 AM   #23
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dshortt9, That sounds better using fewer components, it would save some space in the amp. Is there any possibility you can sketch or explain the circuit "Most clone builders are using at least this much and adding inductors to make a pi filter. 4 x 33,000 uf and 2 x 2 - 4 mh inductors would work fine"

thanks mike
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Old 23rd December 2002, 04:42 AM   #24
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Look at the previous schematic and substitute one 33000 capacitor wherever two of other values are specified. A pi filter means that ain inductor is used between two capacitors, C-L-C. Two pi filters are needed, one for each polarity, + and - .
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Old 23rd December 2002, 10:02 PM   #25
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dshortt9, good explanation. Is 14 awg wire adequate for the wiring of the power supply? Any suggestions for some wirre that WOuld work for the power supply?

Thanks Mike
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Old 24th December 2002, 01:53 PM   #26
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14 should work fine. Have you looked at the Pass DIY page to get some layout ideas? http://www.passdiy.com/ Look in the Gallery.
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Old 24th December 2002, 02:36 PM   #27
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dshortt9, No I have not studied the gallery yet, I wanted to get all the parts together first. Next I will lay them out and compare to what others have done in the gallery and try to create the best setup. I called http://www.brigarelectronics.com/ and ordered 8 of the caps today....thanks for telling me about that place.

What do you think about the inductors for the power supply earlier you said "2 x 2 - 4 mh inductors would work fine", would you use air core or copper foil? I used the copper foil for my speakers but I didnt know if it mattered for the power supply.

Thanks Mike
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Old 24th December 2002, 02:48 PM   #28
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I also used copper foil in my ProAc 2.5 clones but air core inductors are fine for the Aleph PS
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Old 24th December 2002, 02:49 PM   #29
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4 mh ar quite large, 2.5's should do OK. What speakers did you build?
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Old 24th December 2002, 05:53 PM   #30
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I am using 14 ga. silver plated copper that is teflon covered for my Aeph 2's. As usual I found his silver plated wire at the local Surplus place. Geez, they ahve everything there someplace......even 12 ga silver plated teflon covered wire that has a very unique 3 layer twist to it.......the 12 ga is a bit unweildly to work with though......
Also my toroids have a frame ground wire as well as allthe other primary and secondaries. Connecting this wire really quiets things down a bit so those looking ofr power transformers may want to be sure to get one with the extra ground wire.
Mark
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