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Aleph J illustrated build guide
Aleph J illustrated build guide
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Old 7th November 2019, 05:29 PM   #4121
Zen Mod is offline Zen Mod  Serbia
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Aleph J illustrated build guide
@Eric

exact schm and pics
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Old 8th November 2019, 12:18 AM   #4122
Eric is online now Eric  United States
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Aleph J illustrated build guide
Here are the images, Zen. They aren't the greatest images, but they are what I have right now. The boards are populated as per the BOM from the DIYA store page. I cut the ground trace to separate the speaker ground from PSU ground and replaced it with either a 10R or 20R (I don't remember which) in order to tame a little bit of hum that I get when both inputs are connected. The big PIO cap has since been replaced with yellow MKC cap.

The PSU is an outboard configuration that I also used with my F4 and M2 amps without any problem. It uses a single Teabag PSU board which features a CRC configuration. It uses a 3-wire umbilical cord with Neutrik termination. Inside the amp, each channel gets its own pos and neg PSU cap.
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File Type: jpg Aleph-J Circuit.JPG (786.5 KB, 242 views)
File Type: jpg Aleph-J PSU.jpg (664.5 KB, 246 views)
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Old 8th November 2019, 05:44 AM   #4123
codyt is offline codyt  United States
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Anyone recommend a capacitor for 3300pf cap in the ac supply line? I’ve not messed with line capacitors before, and unsure what kind of specs (aside from capacitance) I need to shot for.
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Old 8th November 2019, 05:53 AM   #4124
6L6 is offline 6L6  United States
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Aleph J illustrated build guide
This is nice-

C921U332MZVDBA7317 KEMET | Mouser
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Old 8th November 2019, 06:26 AM   #4125
Ben Mah is offline Ben Mah  Canada
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Quote:
Originally Posted by Eric View Post
Here are the images, Zen. They aren't the greatest images, but they are what I have right now. The boards are populated as per the BOM from the DIYA store page. I cut the ground trace to separate the speaker ground from PSU ground and replaced it with either a 10R or 20R (I don't remember which) in order to tame a little bit of hum that I get when both inputs are connected. The big PIO cap has since been replaced with yellow MKC cap.

The PSU is an outboard configuration that I also used with my F4 and M2 amps without any problem. It uses a single Teabag PSU board which features a CRC configuration. It uses a 3-wire umbilical cord with Neutrik termination. Inside the amp, each channel gets its own pos and neg PSU cap.

The capacitor that is second from the top is not wired to the same terminals as the other three.
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Old 8th November 2019, 08:09 AM   #4126
codyt is offline codyt  United States
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Quote:
Originally Posted by 6L6 View Post
Thanks!
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Old 8th November 2019, 12:39 PM   #4127
Eric is online now Eric  United States
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Quote:
Originally Posted by Ben Mah View Post
The capacitor that is second from the top is not wired to the same terminals as the other three.
The top two caps feed the channel in the left side of the image. The two bottom caps feed the channel in the right side of the image.
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Old 8th November 2019, 02:40 PM   #4128
Ben Mah is offline Ben Mah  Canada
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I understand that. However, the red wires to the second cap (positive pin) is to a different pin than at the other three caps.
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Old 8th November 2019, 07:19 PM   #4129
Eric is online now Eric  United States
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OMG I've been looking at this for a long time and just didn't see that..

Given the current that circulates through here, I'm lucky this didn't cause a real problem for me. I bet this is the cause for both of my problems: hum and the turn-off chirp.

This is easy enough to explore tonight! Thank you!
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Old 8th November 2019, 08:05 PM   #4130
Ben Mah is offline Ben Mah  Canada
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You're welcome. I hope it works out.

Last edited by Ben Mah; 8th November 2019 at 08:08 PM.
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