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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 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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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.
The capacitor that is second from the top is not wired to the same terminals as the other three.
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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.
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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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!
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!
Pass DIY Addict
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Bingo! Moved the wires on the cap (duh) and now everything is great! Amp is absolutely silent even with my ear right in the speaker and the power-off chirp is gone. Thanks for the extra set of eyes, I can't believe I didn't see that...
Just starting a build, either AJ or F6 or both. I'll be building it into a 5U DIY audio case. First I'm starting on the DIYaudio PSU CRC all good so far..would 3k3 4W bleed off resistors be OK.
TIA
TIA
Pass DIY Addict
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Laverda - 3k3 4w is great. I use 2k2 2w in mine, so you'll just have slightly slower bleed off of voltage.
Roo2: is that a copper mesh sheet? Looks great!
My completed chassis for the Aleph-J is linked in my signature.
Roo2: is that a copper mesh sheet? Looks great!
My completed chassis for the Aleph-J is linked in my signature.
