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Another β24 from Bay Area!

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Another β24 from Bay Area!

Postby amb » January 17th, 2019, 3:54 am

Nice job! Looking forward to more photos. Repurposing an IKEA cart is very creative!
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Re: Another β24 from Bay Area!

Postby goliraja » January 17th, 2019, 1:58 pm

Initially I was planning to use Takachi HYRH series http://www.takachi-enclosure.com/data/new_products.html. When I received monster Plitron x'fomer, I was looking for a place to keep it for few days before moving it to the workshop (garage). And guess what? It ended up being placed in the lower rack of the cart (which I had assembled for my kitchen). Based on the estimated weight of the unit, I realized it won't be easy to move things around.

On checking the dimension (width), it came close (21") to standard rack dimension (19"). I started looking at the alternative to mount the PSU and AMP.

Came across 14.5" Middle Atlantic rack, but it won't fit (depth):
amb_004.jpg


Had to go with 8" rack. Removed top shelf of the cart and added two racks to the bottom shelf.
1st rack - Nichicon Cap, Rectifier, SumR x'former, Star Ground (pic is bit dark):
amb_005.jpg


2nd rack - Sigma 22 and power switch driver circuit:
amb_006.jpg


Both racks were stacked using standoff and mounted to bottom shelf. There was enough room left for Plitron x'former as well.
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Re: Another β24 from Bay Area!

Postby goliraja » January 17th, 2019, 2:13 pm

More pics ...

Bottom shelf, both racks stacked and mounted:
amb_008.jpg


Painted the cart (should have done before mounting the racks):
amb_009.jpg


PCB mounted on heatsink using Max Clip (drilled and tapped for M3 - 5mm, steel standoffs and screws):
amb_007.jpg


Tapped for the first time. Made few mistakes and broke the tap. Luckily I was able to pull it out of the hole. It's difficult to get perpendicular hole using hand drill. Once you're done with 2-3 holes, you'll automatically get an idea about when to stop (how deep and torque for tapping). Would advise to use Tap Magic to make things easier.
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Re: Another β24 from Bay Area!

Postby goliraja » January 17th, 2019, 2:25 pm

More pics...

Preparing L-channel and U-channel brackets for mounting heatsinks:
amb_010.jpg


Attaching u-channels the back (from inside) of upper shelf:
amb_011.jpg


If you look at 8" heatsink profile from heatsinkusa https://www.heatsinkusa.com/8-000-wide-extruded-aluminum-heatsink/, it fits perfectly in the u-channel.

Another view:
amb_012.jpg
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Re: Another β24 from Bay Area!

Postby goliraja » January 17th, 2019, 2:35 pm

More pics...

Both heatsinks mounted to the cart using u & l channels:
amb_014.jpg


Lower shelf, detailed view of both racks connected via standoff and screwed from inside to the cart:
amb_015.jpg


Upper rack, showing details of PSU:
amb_016.jpg
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Re: Another β24 from Bay Area!

Postby goliraja » January 17th, 2019, 2:40 pm

More pics...

Lower shelf, another view:
amb_017.jpg


amb_018.jpg


Power distribution for unregulated power supply: large terminal strip.
Power distribution for Switch Driver unit: small terminal strip and SSR:
amb_019.jpg
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Re: Another β24 from Bay Area!

Postby goliraja » January 17th, 2019, 2:45 pm

More pics...

X'former and PSU connections:
amb_020.jpg


amb_021.jpg


Switch driver x'former and relay (above filter caps):
amb_022.jpg
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Re: Another β24 from Bay Area!

Postby goliraja » January 17th, 2019, 2:57 pm

More pics...

Plitron x'former mounted at the bottom shelf:
amb_024.jpg


Used Neutrik DBA-BL Blank Plate (Black) to mount DPDT input selector switch to the Neutrik rack panel (NZP1RU-8):
amb_025.jpg


Completed Neutrik rack panel (used all Neutrik connectors):
amb_026.jpg


Found few items like Neutrik rack panel, Midle Atlantic rackshelf and Gator rack panels were cheaper at B&H compared to other suppliers.

Most likely I'll complete the enclosure this weekend and post additional pictures.

Comments/feedback/suggestions/alternative design approach welcome.

Thanks!
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Re: Another β24 from Bay Area!

Postby amb » January 19th, 2019, 5:27 pm

Definitely different! A conversation piece that happens to be an awesome amp!
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Re: Another β24 from Bay Area!

Postby muskyhuntr » January 20th, 2019, 3:28 am

I agree with AMB! I'm also seeing lots of attention to detail. Can't wait to see final pictures.

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