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The Alpha Big Boy with Buttah (ABBB) 52w Class A Amp GB
The Alpha Big Boy with Buttah (ABBB) 52w Class A Amp GB
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Old 13th June 2019, 04:22 PM   #21
xrk971 is offline xrk971  United States
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Join Date: Oct 2012
Location: Metro DC area
The Alpha Big Boy with Buttah (ABBB) 52w Class A Amp GB
Quote:
If they cannot be drilled, how to you secure the device to the sink?
Drill and tap to M3 or 4-40 threaded holes into the aluminum frame and use those to hold an L section channel clamp bar. Vunce has some nice closeup build photos I think.
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Old 13th June 2019, 05:21 PM   #22
md_Stryker is offline md_Stryker  United States
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Join Date: Jan 2006
Location: Dundee, MI
The Alpha Big Boy with Buttah (ABBB) 52w Class A Amp GB
Default Group buy list

gary s - 2 boards
jwjarch - 2 boards
Vunce - 2 boards
meanie - 2 boards
shattered_dream - 2 boards
yoaudio - 2 boards
md_Stryker - 2 boards
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Old 13th June 2019, 06:05 PM   #23
Roundtoit is offline Roundtoit  United States
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Join Date: Feb 2016
Location: By a creek in Missouri
I'm imagining a pair of long, slim monoblocks with the heat sinks sticking up in the rear. The many design aesthetics have me reaching for the sketchbook. That's nice looking work Vunce!

gary s - 2 boards
jwjarch - 2 boards
Vunce - 2 boards
meanie - 2 boards
shattered_dream - 2 boards
yoaudio - 2 boards
md_Stryker - 2 boards
Roundtoit - 2 boards
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Old 13th June 2019, 06:47 PM   #24
xrk971 is offline xrk971  United States
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The Alpha Big Boy with Buttah (ABBB) 52w Class A Amp GB
Nice to see the growing list of interest. When we reach about 25 boards, I will start taking pre-orders for the GB on my Etsy shop.
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Old 13th June 2019, 07:11 PM   #25
sst4270 is offline sst4270  United States
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Join Date: Aug 2005
Location: Glen Burnie, MD
Can't wait!

gary s - 2 boards
jwjarch - 2 boards
Vunce - 2 boards
meanie - 2 boards
shattered_dream - 2 boards
yoaudio - 2 boards
md_Stryker - 2 boards
Roundtoit - 2 boards
sst4270 - 2 boards
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Old 13th June 2019, 07:25 PM   #26
xrk971 is offline xrk971  United States
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The Alpha Big Boy with Buttah (ABBB) 52w Class A Amp GB
I don’t think it’s a problem to show you guys what I am going to be making on a P2P veroboard to test out a new SSR speaker protection/delay system that Jhofland designed. It’s very clever and compact. It uses an optoisolator to sense the DC and several comparators to decide if the level warrants disconnecting the speakers. The second comparator checks a time constant to give enough time for the turn on thump to settle. These comparators then drive another optoisolator to drive the gates of a pair of low RDSon MOSFETs (the Solid State Relays) that make/break the connection to the speaker. All will be powered from the positive rail via a 27v zener diode voltage reducer.

The Alpha Big Boy with Buttah (ABBB) 52w Class A Amp GB-9193d28b-a369-432f-b8e3-c0214abda073-jpeg
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Old 13th June 2019, 07:27 PM   #27
chiily is offline chiily  United Kingdom
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Please put me down for two boards.

Thanks
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Old 13th June 2019, 07:29 PM   #28
xrk971 is offline xrk971  United States
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The Alpha Big Boy with Buttah (ABBB) 52w Class A Amp GB
GB interest status update

Quote:
gary s - 2 boards
jwjarch - 2 boards
Vunce - 2 boards
meanie - 2 boards
shattered_dream - 2 boards
yoaudio - 2 boards
md_Stryker - 2 boards
Roundtoit - 2 boards
sst4270 - 2 boards
chilly - 2 boards
We are at 20 already - nice.
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Old 13th June 2019, 07:43 PM   #29
JPS64 is offline JPS64  Germany
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and if you want to build something really (I hope) new?!


JP
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Old 13th June 2019, 07:46 PM   #30
xrk971 is offline xrk971  United States
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The Alpha Big Boy with Buttah (ABBB) 52w Class A Amp GB
Hehe, I forgot that I have a liquid cooling setup somewhere waiting for me in a box. However, I recently acquired a pair of very nice Mac Pro workstation CPU coolers that might be perfect for the job.

The liquid cooling does keep things compact. Still needs a fan though. So Noctua will still be the one to use.
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