Hello
I'm Marc from France
I'm new on this forum...
I have a pair of Aleph Pass One monoblocks
Not a lot of informations about those amps...
I think they need to be recaped
Can you please tell me what kind of caps I could find for those amps ?
Do I have to do something else ?
Thanks a lot
Marc
I'm Marc from France
I'm new on this forum...
I have a pair of Aleph Pass One monoblocks
Not a lot of informations about those amps...
I think they need to be recaped
Can you please tell me what kind of caps I could find for those amps ?
Do I have to do something else ?
Thanks a lot
Marc
Aleph 1
120 lbs. per channel
150 watts at 8 ohms.
300 watts at 4 ohms.
The Aleph 1 doubled the power of the Aleph 0. and had the same 3 gain stages.
All following Alephs from the 1.2 on - went to two output stages - sounding better, but losing
the ability to double down their power into tougher loads. The new improvement was the
"Aleph current source".
-->i never saw a service manual for the 1, but i'm sure if you looked at the Aleph 0 manuals
you'd get some help
120 lbs. per channel
150 watts at 8 ohms.
300 watts at 4 ohms.
The Aleph 1 doubled the power of the Aleph 0. and had the same 3 gain stages.
All following Alephs from the 1.2 on - went to two output stages - sounding better, but losing
the ability to double down their power into tougher loads. The new improvement was the
"Aleph current source".
-->i never saw a service manual for the 1, but i'm sure if you looked at the Aleph 0 manuals
you'd get some help
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Do you thinks my Aleph One can be modded into 2 gain stages ???
Doubtful. The Aleph 1 uses a complementary N+P output stage instead of the somewhat quasi-complentary N+N output stage of the two-stage Alephs (e.g. 3/30, 5/60, 2, etc.)
The pictures !!!
http://img15.hostingpics.net/pics/713380IMG0441.jpg
http://img15.hostingpics.net/pics/498246IMG0442.jpg
http://img15.hostingpics.net/pics/659046IMG0443.jpg
http://img15.hostingpics.net/pics/850396IMG0445.jpg
http://img15.hostingpics.net/pics/738524IMG0446.jpg
http://img15.hostingpics.net/pics/671152IMG0447.jpg
http://img15.hostingpics.net/pics/932326IMG0449.jpg
http://img15.hostingpics.net/pics/713380IMG0441.jpg
http://img15.hostingpics.net/pics/498246IMG0442.jpg
http://img15.hostingpics.net/pics/659046IMG0443.jpg
http://img15.hostingpics.net/pics/850396IMG0445.jpg
http://img15.hostingpics.net/pics/738524IMG0446.jpg
http://img15.hostingpics.net/pics/671152IMG0447.jpg
http://img15.hostingpics.net/pics/932326IMG0449.jpg
Found this:
PassLabs Aleph1 Service Manual free download,schematics,datasheets,eeprom bins,pcb,repair info for test equipment and electronics
Hope it is of use.
Cheers,
Dennis
PassLabs Aleph1 Service Manual free download,schematics,datasheets,eeprom bins,pcb,repair info for test equipment and electronics
Hope it is of use.
Cheers,
Dennis
from pictures - obviously late amp iteration , without much electrolyt caps ..... except main reservoir ones
if you have hum , even without preamp connected (or with XLR shorted on all pins) , there is definitelly need to replace those caps
however , due to physical execution of contacts to pcb , it seems you're pretty much stuck with cap dimensions , primarily regarding pinout spacing .
height and dia , that can be varied , with some ingenuity
so , 22 to 33mF per each , 75Vdc ....... good luck in finding them ......
it'll help if you measure their dimensions (dia , height , pin spacing) and post here ....... and - maybe it will help you in search - that type of cans is usually called computer grade
if you have hum , even without preamp connected (or with XLR shorted on all pins) , there is definitelly need to replace those caps
however , due to physical execution of contacts to pcb , it seems you're pretty much stuck with cap dimensions , primarily regarding pinout spacing .
height and dia , that can be varied , with some ingenuity
so , 22 to 33mF per each , 75Vdc ....... good luck in finding them ......
it'll help if you measure their dimensions (dia , height , pin spacing) and post here ....... and - maybe it will help you in search - that type of cans is usually called computer grade
It seems like the original part is still available:
http://www.mouser.fr/ProductDetail/...Ux/Er7vwMzb2x%2bIg50xtCcw1AX6u9W4lwrtZa4hrA==
Here's a slightly lower capacitance, higher voltage and cheaper alternative:
http://www.mouser.fr/ProductDetail/...RpZPHVy%2bjtQuXjWPKFKB4rpZCm6%2bHpYmBZUXJsZFR
This one should be a good fit, but not stocked:
http://www.mouser.fr/ProductDetail/...=sGAEpiMZZMtZ1n0r9vR22caJrJGgYX4Idp3QbjM3BjU=
Good luck with your search and restoration effort.
Dennis
P.S. Beautiful amp you have!
http://www.mouser.fr/ProductDetail/...Ux/Er7vwMzb2x%2bIg50xtCcw1AX6u9W4lwrtZa4hrA==
Here's a slightly lower capacitance, higher voltage and cheaper alternative:
http://www.mouser.fr/ProductDetail/...RpZPHVy%2bjtQuXjWPKFKB4rpZCm6%2bHpYmBZUXJsZFR
This one should be a good fit, but not stocked:
http://www.mouser.fr/ProductDetail/...=sGAEpiMZZMtZ1n0r9vR22caJrJGgYX4Idp3QbjM3BjU=
Good luck with your search and restoration effort.
Dennis
P.S. Beautiful amp you have!
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