yet another gainclone thread

Jean · 1st June 2004, 04:59 AM

Here is my stereo gc case that I am working on. Heatsinks are Conrad mf25-75 . I got the aluminum from a local place called Blue Collar Supply in Sacramento for a really good price. Thank you George!

Before drilling

Clamped the 1/4" plate for drilling

Drilled the front holes

Countersink

This is the front view of 1/4" plate attached to 1/2" square

View of the back plate with rca holes

Overall view w/o heatsinks and top plate attached .

Clamping 1/2" squares for drilling into heatsinks

Today I started drilling and tapping heatsinks

This is the bottom with stand offs to hold the boards in place

Like so

So far, everything lines up fine now I need to fit the bottom cover

I got some cleaning to do now

mAJORD · 1st June 2004, 11:47 AM

Very nice!. simple but impressive result. I have been thinking of doing something similar for mine

peranders · 1st June 2004, 12:22 PM

No problem with cooling

( I want a happy "no" icon!)

UrSv · 1st June 2004, 12:29 PM

Stack everything double, both GC and rectifier boards, and make a 4-channel GC. Right on top of eachother.

That case is capable as well as nice.

azira · 1st June 2004, 04:19 PM

Nice looking work. Those heatsinks are going to be overkill for just 2 channels, I second the idea of making it 4 channel.

Great to see another person from Sacramento. Thanks for the info on the metal shop, I'll have to check it out for some of my own cases.
--
Danny

jleaman · 1st June 2004, 05:57 PM

Thats impressive : O) I like that..

Jamh · 1st June 2004, 06:16 PM

Don't think there's enough height to double.

Jean · 1st June 2004, 06:55 PM

Hello,

I did think about doing that, maybe in bridged mode ? I don't believe I can fit multiple toroids in there

though Ignore my hack job with standoffs, it works with 0.25 on the bottom and 1.25 on top of the bottom board.

Jean · 12th July 2004, 05:18 AM

I got the final needed components from Brian and populated the boards. I used Panasonic capacitors on the psu and amplifier boards, saved the BlackGate 4.7s for later use.

Power supply works fine, 36 volts on each side . Now I just need to mount the chips to the heatsinks. I had small problem on one side, after I made a 6-32 tap i tested it with aluminum bolt and broke it

I managed to drill it out with a very fine drill bit right in the center, then used a hole punch that I stuck inside the broken bolt that was stuck in the heatsink thread and removed it

Variac · 12th July 2004, 05:47 AM

Very nice work. What is the VA of the transformer?

Blue Collar Supply had Aleph heatsinks a couple of years ago..
I guess I should drive over just to visit them!!

1st June 2004, 04:59 AM	#1
Jean diyAudio Member Join Date: Mar 2002 Location: Sacramento, CA	yet another gainclone thread Here is my stereo gc case that I am working on. Heatsinks are Conrad mf25-75 . I got the aluminum from a local place called Blue Collar Supply in Sacramento for a really good price. Thank you George! Before drilling Clamped the 1/4" plate for drilling Drilled the front holes Countersink This is the front view of 1/4" plate attached to 1/2" square View of the back plate with rca holes Overall view w/o heatsinks and top plate attached . Clamping 1/2" squares for drilling into heatsinks Today I started drilling and tapping heatsinks This is the bottom with stand offs to hold the boards in place Like so So far, everything lines up fine now I need to fit the bottom cover I got some cleaning to do now __________________ left lane is for passing, slower traffic keep right please.

1st June 2004, 12:22 PM	#3
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	No problem with cooling ( I want a happy "no" icon!) __________________ /Per-Anders (my first name) or P-A as my friends call me

1st June 2004, 12:29 PM	#4
UrSv diyAudio Member Join Date: Jan 2002 Location: Sweden	Stack everything double, both GC and rectifier boards, and make a 4-channel GC. Right on top of eachother. That case is capable as well as nice. __________________ UrSv Those who say it can't be done should not stop those who are doing it.

1st June 2004, 06:55 PM	#8
Jean diyAudio Member Join Date: Mar 2002 Location: Sacramento, CA	Hello, I did think about doing that, maybe in bridged mode ? I don't believe I can fit multiple toroids in there though Ignore my hack job with standoffs, it works with 0.25 on the bottom and 1.25 on top of the bottom board. __________________ left lane is for passing, slower traffic keep right please.

12th July 2004, 05:18 AM	#9
Jean diyAudio Member Join Date: Mar 2002 Location: Sacramento, CA	small update I got the final needed components from Brian and populated the boards. I used Panasonic capacitors on the psu and amplifier boards, saved the BlackGate 4.7s for later use. Power supply works fine, 36 volts on each side . Now I just need to mount the chips to the heatsinks. I had small problem on one side, after I made a 6-32 tap i tested it with aluminum bolt and broke it I managed to drill it out with a very fine drill bit right in the center, then used a hole punch that I stuck inside the broken bolt that was stuck in the heatsink thread and removed it __________________ left lane is for passing, slower traffic keep right please.


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1st June 2004, 11:47 AM	#2
mAJORD diyAudio Member Join Date: Apr 2004 Location: Brisbane Australia	Very nice!. simple but impressive result. I have been thinking of doing something similar for mine

1st June 2004, 04:19 PM	#5
azira diyAudio Member Join Date: Dec 2003 Location: Near Seattle	Nice looking work. Those heatsinks are going to be overkill for just 2 channels, I second the idea of making it 4 channel. Great to see another person from Sacramento. Thanks for the info on the metal shop, I'll have to check it out for some of my own cases. -- Danny

1st June 2004, 05:57 PM	#6
jleaman Banned Join Date: Apr 2002	Thats impressive : O) I like that..

1st June 2004, 06:16 PM	#7
Jamh diyAudio Member Join Date: Dec 2003 Location: sacramento	Don't think there's enough height to double.

12th July 2004, 05:47 AM	#10
Variac diyAudio Editor Join Date: Dec 2001 Location: San Francisco, USA	Very nice work. What is the VA of the transformer? Blue Collar Supply had Aleph heatsinks a couple of years ago.. I guess I should drive over just to visit them!! __________________ Burning Amp Festival Sunday, October 28th, 2012 in S.F. We need Volunteers & sign-up's for what you're bringing!

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