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Old 2nd November 2012, 12:26 PM   #1
bcmbob is online now bcmbob  United States
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Location: Bay City, Michigan
Default Liquid Cooling Build

Anatomy of a BLAT.

No not that one. This one - Bomac Liquid Audio Technology. It started out as just the BLA, but applied to a 2.1 speaker system it resolves to Bla, Bla, Bla. Not good. So added the “T” and was quickly advised by JB (lehmanhill) that I had moved from the shop to the kitchen.

I have several PCs with liquid cooling and mostly out of curiosity wanted to apply that method to audio. Purchased two of these on a whim and collected the necessary parts from the stash. No way to drill into the coolers so a standoff plate was built.

Located the mounting hole by spreading compound on the chip which was soldered to the PCB with standoffs attached.

LC05.jpgLC01.jpg LC04.jpg LC02.jpg



The simplest, though not most efficient way to combine the plate and the cooler was double sided heat transfer tape. They were clamped together overnight for a solid set. If I do another one I'll make some sort of bracket that will allow the use of paste instead of thermal tape.

LC06.jpg LC07.jpg


Mounted amp module to cooler and cut tubing links.


LC08.jpg

LC8a.JPG

LC09.jpg
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Old 2nd November 2012, 12:43 PM   #2
bcmbob is online now bcmbob  United States
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]First shot was built on plywood frame. The cooling elements were all standard 80 mm format.

LQ04.jpg LQ05.jpg


Fill port/air release worked great but I didn’t like having the liquid that close to the amps.

LQ05a.jpg LQ06.jpgLQ07.jpg LQ08.jpg LQ09.jpg


Here the system is making cool music with no leaks and a stable temp just above ambient.
LQ02.jpg
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Old 2nd November 2012, 01:03 PM   #3
bcmbob is online now bcmbob  United States
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Second attampt was centered around the idea of keeping the liquid below the amp. Cobbled up another woden frame and placed my chin firmly on my palm and began to ponder.

LO14.jpg LQ13.jpg LQ15.jpg



Started fabrication of base for cooling system with 1/8” x 2” aluminum angle from the local hardware store. Transformer brackets are from ¼’ x 3’ angle.

LQ16.jpgLQ17.jpg LQ18.jpg



Attached 1/16” corner braces with two part epoxy for both stability and squareness.

LQ19.jpg LQ20.jpgLQ22.jpg
Attached Images
File Type: jpg LQ23.jpg (159.2 KB, 1425 views)
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Old 2nd November 2012, 01:04 PM   #4
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Very Cool !!!
I have been wanting to do something like that for Year's !!!
Great Job !!!



jer
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Old 2nd November 2012, 01:16 PM   #5
AndrewT is offline AndrewT  Scotland
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Quote:
Originally Posted by geraldfryjr View Post
Very Cool !!!
that's the purpose !!!
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Old 2nd November 2012, 01:16 PM   #6
bcmbob is online now bcmbob  United States
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Photo of lap/inset construction.

LQ29.jpg LQ25.jpg LQ26.jpg





Underside with support/feet and a touch of Bondo for the oopses from hand cutting.

LQ28.jpg

Holes for bottom supports are countersunk for flathead screws.

LQ27.jpgLQ30.jpg


Corner reliefs for wire paths on transformer bracket.
LQ31.jpgLQ32.jpg

Looks like it’s going to work so now on to the reservoir.
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Old 2nd November 2012, 01:25 PM   #7
bcmbob is online now bcmbob  United States
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Initially hoped to do a combo pump/reservoir with a fish tank AC powered unit. But it was too big for the cooling box. As luck would have it, the seven year old pump in my main PC lost a bearing during this time so it wasn’t a total waste.

LQ33.jpg

Right method but still to awkward for installation in the BLAT.

LQ33b.jpg LQ34.jpg


Gave up on the combo unit and built a res I knew would fit.
LQ35.jpg

Shows outline of inlet deflection plate and square outlet suction tube.
LQ36.jpg

Here are some leak test pics. Problems can be masked when the system is active so an overnight non-powered proof was done.
LQ37.jpgLQ38.jpg
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Old 2nd November 2012, 01:40 PM   #8
bcmbob is online now bcmbob  United States
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Oh, I forgot about the signal. With my chin still firmly mounted on my palm (visualize “The Thinker”) the following developed. There wasn't enough room to mount the posts in the standard position without inteference with the cooling tubes. A 90 degree flip did the trick.

LQ44.jpg LQ41.jpg LQ42.jpg LQ45.jpg LQ47.jpg

More corner removal to prevent the possibility of a short from insulation damage.
LQ46.jpg


Looks like everything fits.
LQ48.JPG LQ49.JPG
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Old 2nd November 2012, 02:01 PM   #9
bcmbob is online now bcmbob  United States
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Wall wart DC socket for pump/fans, AC inlet with self-contained fuse and safety ground lug.

LQ50.jpg

Putting it all together with wiring. Hoorraay!

LQ51.jpg LQ52.jpg LQ53.jpg
LQ54.jpg


Cut and tape together possible cover from postboard. It was then glued together and all the tape removed.

LQ55.jpg LQ56.jpg

LQ57.jpg


For the purpose of collecting some temperature data, I also made a standard cooling rig for comparison/discovery of efficiency.

LQ58.jpg LQ60.jpg

Still have to decide where to place remote FE LEDs, or change to a lighted main switch.

This is the smallest format - 40mm, but 70, 80, and 120 are available if your amp can heat your music room on an autumn afternoon.


There you have it. The anatomy of a BLAT. Great fun and a worthy challenge. Probably not where Dario thought his excellent design would end up, but I couldn't resist.

Cooling liquid is the same as what has been used in the PCs.
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Last edited by bcmbob; 2nd November 2012 at 02:08 PM.
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Old 2nd November 2012, 02:21 PM   #10
bcmbob is online now bcmbob  United States
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Andrew, I got two answers to your question:

1. It's the same as the answer to the question "Why does a man climb a mountain?"

2. A three letter word that starts with "F" and ends with "N". You may or may not be familiar with the concept.


P.S. and maybe a little useful discovery.
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