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Aleph J illustrated build guide
Aleph J illustrated build guide
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Old 20th January 2014, 08:44 AM   #521
brianco is offline brianco  Ireland
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Old 22nd January 2014, 08:34 PM   #522
punkzter is offline punkzter  United States
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Is there a way to add a mono/stereo switch to this amp? I'm looking into building this amp or something like it, but want to maintain that capability that my current receiver has. It really helps out when listening to mono records.

Thanks!

~Brad
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Old 22nd January 2014, 11:07 PM   #523
Zen Mod is offline Zen Mod  Serbia
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Aleph J illustrated build guide
best to implement mono switching in low level box - where selector and attenuator are situated
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Old 27th January 2014, 10:05 PM   #524
roger57 is offline roger57  Canada
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Default Parts Trickling In...

Just getting things together for the Aleph J build. Received heat sinks today from "heatsinksusa". It's been a while since I've received this level of service and quality. Precision extruding and cutting to length. Now off to the anodizer...will keep posting with progress...
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Old 27th January 2014, 10:42 PM   #525
topofthedial is offline topofthedial
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Default It works!

I finally finished up my amp this weekend, adjusted bias and offset, and plugged it in over lunchtime to check it out. It produces sound, and that sound is good!

That said, I am getting some minor hum from the amp. I couldn't really notice it while music was playing, but it's audible when I get close to the speaker and music isn't playing. I've attached a picture of the inside of the amp. Any ideas?

Many, many thanks to Jim for his help, hooking me up with the final few parts I needed, and the awesome cup of coffee!
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Old 27th January 2014, 11:00 PM   #526
BobEllis is offline BobEllis  United States
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Is the hum the same from both channels? Try moving the terminal strip with the CL60s on it further from the amp board.
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Old 27th January 2014, 11:02 PM   #527
Zen Mod is offline Zen Mod  Serbia
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Aleph J illustrated build guide
according to pic , I think you messed something with doubling those PSU boards
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Old 28th January 2014, 01:24 AM   #528
6L6 is offline 6L6  United States
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Aleph J illustrated build guide
Maybe. Perhaps a few more jumpers can be placed on the PSU board ground links.

But I think it's just to-long wires... As he lives just a few miles from my house, I'm thinking I can take a look at it soon.
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Old 28th January 2014, 01:59 AM   #529
bnorrish is offline bnorrish  United States
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Tough to tell in the picture. Is the PSU ground touching the perfboard where it joins the CL60 with the mains ground that is bolted to the perf board?
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Old 28th January 2014, 11:00 AM   #530
Bones13 is offline Bones13  United States
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Aleph J illustrated build guide
There is a green wire from the grounding bolt to the ground pad on the cap board. I could trace it after blowing up the pic some. (Easily done on the ipad)

I'm in the "wires too long" camp, and the AC strip too close.
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