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Old 18th January 2012, 07:40 PM   #11
ra7 is offline ra7  United States
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6L6, maybe you can use the new first post perpetual edit feature and modify your first post to link to all posts with good info on the aleph amp (schematics, mods, bom, etc).
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Old 18th January 2012, 07:48 PM   #12
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My collection waiting for list.

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Old 19th January 2012, 03:08 AM   #13
pchw is offline pchw  United States
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FWIW, the latest black boards have the cap problem (post #2) corrected. It was only in the first version (blue board??).
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Old 19th January 2012, 05:24 AM   #14
slomatt is offline slomatt  United States
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Quote:
Originally Posted by pchw View Post
FWIW, the latest black boards have the cap problem (post #2) corrected. It was only in the first version (blue board??).
It looks like the marking for C1 on zeonrider's boards are backwards as well. According to the schematic I posted in post #2 of this thread the positive side of C1 should connect to C4 and R15. On the boards it is reversed.

While we talking mini alephs, does anybody have any input on the power supply CRC question I posted in the ps thread?
Mini Aleph Power Supply

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Old 19th January 2012, 07:42 AM   #15
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Again:

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Old 19th January 2012, 07:56 AM   #16
pchw is offline pchw  United States
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The schema that you posted actually was the origin of the mistake see:

New Aleph Mini PCB GB

Here are 2 more posts about fix in the new board:

New Aleph Mini PCB GB
New Aleph Mini PCB GB

Last post said it was corrected.

I hope this will help.
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Old 19th January 2012, 09:00 AM   #17
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And finally, what is the real schematic of Aleph 5 acording the black pcb?

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Old 19th January 2012, 04:22 PM   #18
pchw is offline pchw  United States
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Both the black and the early red boards are good for mini-A, Aleph 3/Aleph 30, Aleph 5, or Aleph 60. They share the same basic schematic but have different rail voltages and bias point and number of output devices.

Keep in mind, Brian didn't use the same part number as Papa's service manual, but it can be easily done to create a BOM for A5 using the black board parts number. Send me an email via the forum ....
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Old 19th January 2012, 05:18 PM   #19
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Send me an email via the forum ....
Sended!

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Old 19th January 2012, 08:59 PM   #20
pchw is offline pchw  United States
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Didn't get any email, I also sent you one. If you don't receive mine, then there maybe a problem with the forum. You can PM me your email.
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