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Old 11th June 2013, 05:11 PM   #2421
sereal is offline sereal  Canada
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Quote:
Originally Posted by lanchile View Post
I always use this company, you can get ANY size you want and they are very precise in their measurements.Extruded Aluminum Heatsinks from HeatSinkUSA
Their prices are reasonable but I think the issue will be shipping costs.
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Old 11th June 2013, 09:37 PM   #2422
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Quote:
Originally Posted by sereal View Post
Their prices are reasonable but I think the issue will be shipping costs.
You should check Farnell what seems to be Newark element14 Canada | Electronic Components Distributor, Electrical Parts in Canada. As I saw they also have some reasonable. The previous good prices were for 1". So a bigger sink cost nearly the same.
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Old 17th June 2013, 12:18 AM   #2423
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My contribution is cheap and simple, quick & dirty.
TDA8251AH (super-cheap at Goldmine Electronics)
Self-made PCB (described here)
Radio Shack #2160124 enclosure ($3.49 shipped, on ebay)

The connectors and potentiometer were already in my at-home inventory. RCA for speaker output is bad form ... if I do another in this enclosure, then I will put proper connectors on the long end.
Attached Images
File Type: jpg 2013-06-16 12.55.58.jpg (451.6 KB, 1228 views)
File Type: jpg 2013-06-16 13.02.03.jpg (331.3 KB, 1172 views)
File Type: jpg 2013-06-16 13.02.45.jpg (286.5 KB, 1106 views)
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Old 20th June 2013, 01:28 PM   #2424
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Default An other LME49811 + mosfets

Click the image to open in full size.

Frontpanel: Plexiglass, black painted from behind, blue led does not penetrate the glass. Plexi glued to a aluminium frame with alu-glue (Bison).
Sides: Oak.
Top: Iron sheet covered with a carbonfibre layer, polished.

Internals:
Again one of my LME49811 driving 2SJ200 + 2SK1529 implementation...
Powersupply, IR2153 driving IKP10n60p IGBTs, half bridge...
ETD34 core
About 400W, efficiency not measured, voltage +/- 63v.

An interesting active virtualground with TL081 control + stupidly ridiculously large capacitor bank...

Temperature controlled forced air cooling, 4x 40mm fans.

Will post internals as soon as I get tired to listening it... May take some time though... BEST OF MY AMPLIFIERS EVER!!!!
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Old 20th June 2013, 02:14 PM   #2425
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Quote:
Originally Posted by palstanturhin View Post

Frontpanel: Plexiglass, black painted from behind, blue led does not penetrate the glass. Plexi glued to a aluminium frame with alu-glue (Bison).
Sides: Oak.
Top: Iron sheet covered with a carbonfibre layer, polished.

Internals:
Again one of my LME49811 driving 2SJ200 + 2SK1529 implementation...
Powersupply, IR2153 driving IKP10n60p IGBTs, half bridge...
ETD34 core
About 400W, efficiency not measured, voltage +/- 63v.

An interesting active virtualground with TL081 control + stupidly ridiculously large capacitor bank...

Temperature controlled forced air cooling, 4x 40mm fans.

Will post internals as soon as I get tired to listening it... May take some time though... BEST OF MY AMPLIFIERS EVER!!!!
Very nice....but...... we need to see the inside!
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Old 20th June 2013, 02:57 PM   #2426
redjr is offline redjr  United States
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Location: Danbury, CT
Very stylish! What about the inside?
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Old 20th June 2013, 03:43 PM   #2427
JMFahey is offline JMFahey  Argentina
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Location: Buenos Aires - Argentina
Quote:
Originally Posted by palstanturhin View Post
Click the image to open in full size.

Frontpanel: Plexiglass, black painted from behind, blue led does not penetrate the glass. Plexi glued to a aluminium frame with alu-glue (Bison).
Sides: Oak.
Top: Iron sheet covered with a carbonfibre layer, polished.
That one looks real elegant.
Congratulations.
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Old 20th June 2013, 07:54 PM   #2428
sereal is offline sereal  Canada
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Whats the enclosure?
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Old 22nd June 2013, 12:09 PM   #2429
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Location: hyderabad. India
Default Chip Amp Photo Gallery

Hi, posting some pictures of LM3875 Gain-clone amp build.

IMG_4343 | Flickr - Photo Sharing!
IMG_4342 | Flickr - Photo Sharing!
IMG_4323 | Flickr - Photo Sharing!
IMG_4322 | Flickr - Photo Sharing!
IMG_4321 | Flickr - Photo Sharing!
IMG_4319 | Flickr - Photo Sharing!
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The mysteries of neurology and how our individual brains function.
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Old 22nd June 2013, 05:25 PM   #2430
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Join Date: Dec 2003
Location: hyderabad. India
Default Chip Amp Photo Gallery

Hi, posting some pictures of LM3875 Gain-clone amp build.

Click the image to open in full size.
IMG_4343 by hydrovac, on Flickr
Click the image to open in full size.
IMG_4323 by hydrovac, on Flickr
Click the image to open in full size.
IMG_4322 by hydrovac, on Flickr
Click the image to open in full size.
IMG_4321 by hydrovac, on Flickr
Click the image to open in full size.
IMG_4319 by hydrovac, on Flickr
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For some people, it's a part of life. For others it's irrelevant.
The mysteries of neurology and how our individual brains function.
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