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Old 18th April 2004, 11:44 PM   #1
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Default New proud owner of Aleph 5

I became a proud owner of an excellent amp Aleph 5. It was tough job for me because it is my first DIY project, but I did it and now it's up to you to judge.
Technical side:
Dual mono construction with two 350VA 2x28V toroids. 8 (4 per channel)BC components electrolytics 33000uf 63V series 154. Excellent caps. One 50A high quality rectifier per channel. Silver plated copper wire throughout PS. 5mm copper plates to connect caps and keep them together.
Kristijans PCBs. Riken resistors, Black Gate Std and FK series 220uf caps. Jensen copper in oil 47nf cap. Mills 5w source resisors 1R and 0.5R. FETs matched to 0.05V. Differential pair to 0.01V. Silver wires for input and output. WBT speaker terminals and Audio Note silver RCA connectors.
I had some problems with grounding (terrible humm) but after experimenting and changing ground scheme few times I succeded in removing humm completely. If there is anybody
interested in the grounding scheme I implemented in the amp I'll be happy to post it here.
Sound is just marvelous. Transparent, detailed and microdinamics is awesome. Soundstage just "exploded" all around my room. I never heard something better than that, and I used and listened to a lot of mid-fi amplification systems. I have to let it burn in for at least 100 hours (Black Gates). Temperature on the heatsinks is around 55 degres Celsius.
I ordered Solens 2.2uf for the bypass in PS, and I'll use the 2uf cap across Zener diode Z5 as Master suggested.
Any comments and suggestions are welcome.

Thanks everybody for help, and especially one big Thank you very much to Nelson and the Pass Labs crew.
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Old 18th April 2004, 11:46 PM   #2
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One more
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Old 18th April 2004, 11:47 PM   #3
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Fets mounted
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Old 18th April 2004, 11:49 PM   #4
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Putting the case together.
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Old 18th April 2004, 11:51 PM   #5
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Testing, testing. It was a very pleasant experience.
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Old 18th April 2004, 11:54 PM   #6
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And finally PCB.
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Old 19th April 2004, 01:32 AM   #7
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What is this...2 1/2 hours and nobody has told you what a wonderful job you did....let me be the first.

Bonito. A lot of money and time very well spent.

Be warned. If you reconnect one of those mid fi units, you won't be able to stand how awfull it sounds after listening to an Aleph for a week.

Good job. And I would be interested in ground changes. I'm most interested in what hummed so I can avoid it.
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Old 19th April 2004, 02:46 AM   #8
karma is offline karma  Canada
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Default verry nice

are these guys new lol

good work........
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Old 19th April 2004, 02:50 AM   #9
MikeW is offline MikeW  United States
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Very nice job. You will enjoy it more and more.
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Old 19th April 2004, 03:42 AM   #10
SI is offline SI  United States
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Very nice indeed!! I'm very interested in finding out about the hum issue. Please keep us posted.

Regards.
SAAD.
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