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Chip Amps Amplifiers based on integrated circuits

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Old 18th May 2006, 07:26 PM   #21
dfdye is offline dfdye  United States
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Here are the boards (from Olimex, and I know the decoupling caps are a little funny!) Power is coming to the underside of the boards. Signal wires are indeed unshielded, but I haven't had any noticable problems with this yet since this is intended as a mid-fi office amp.

Also, the heat sink is a modified old SlotA computer heat sink. It stays warm, but definitely not hot when cranked up, so I am pretty sure it will be long term stable. I have taped a thermocouple to the heatsink for the time being to make sure that there isn't an issue, but so far so good!!
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Old 18th May 2006, 07:36 PM   #22
dfdye is offline dfdye  United States
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Finally, the rear connection pannel is aluminum plate in place of the SCSI connector plate. The fan is not presently connected, but I figured it was easier to leave it in than modify the back of the case. Besides, if I ever need ventilation, I can always hook it up. Jacks are generic from ApexJr again, but are cheap and work great so far!!

Hope you enjoy!
David
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Old 18th May 2006, 07:45 PM   #23
dfdye is offline dfdye  United States
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Woops, last picture! Here is the cap bank for the amp!
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Old 26th May 2006, 07:19 PM   #24
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My GC's are BrianGT deluxe lm3875s with recycled T-6061 aluminum enclosures. They sound better than they look...
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Old 26th May 2006, 07:25 PM   #25
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Looks better covered up...

-Mal
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Old 26th May 2006, 07:26 PM   #26
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The amps look great, i think.
But on the first pic it looks like you stuck them under your seat.
Pretty cool looking amp cases, there's an industrial designer in the house.
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Old 26th May 2006, 10:57 PM   #27
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Malotron

very smart enclosures.

I have some aluminum bracket,I was thinking of doing the same thing. Or maybe an amp that look like borg cubes(recycling a food warmer)
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Old 28th May 2006, 03:49 AM   #28
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The parts for this amp have been sitting on the shelf for over a year, so I decided to start putting it together. It's all built, just need to wire it now. The pcb's are from BrianGT. The tranformer from Parts Express, The LM3875TF chips sampled from National Semiconductor, 6061 billet plate purchased locally, 1" plexiglass & RCA inputs from Ebay, the rest I had laying around.
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Old 28th May 2006, 03:51 AM   #29
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View from the back
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Old 28th May 2006, 03:52 AM   #30
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And with the top on, a view from the side showing the heat pipe heat sinks.
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