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Old 12th May 2011, 08:09 PM   #1821
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That's a 85' model alpha 230 from Hamamatsu , Japan. 23 years of block parties in the Bronx , new york , another 20 (or 30+ 100v caps everywhere) as "reborn".
I am shaking the house , PS never even gets warm. "Skived" heatsinks really put out the heat. This was good practice for the "DIY" amp's I'm about to make , they will be Soooo easy (compared to this one).

OS
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Old 14th May 2011, 02:01 PM   #1822
wmincy is offline wmincy  Malaysia
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Default just-finished μPF Amp

Dear All,

just want to share my excitement with you after finishing my μPF Amp, which stands for μ-follower+power follower.

Since the power follower which is the P version (using 2SJ162 that I had on hand) of Andrea Ciuffoli's amp has "zero" gain, so I decided to add a VAS stage built up with a 5814(ECC82) and a IRF740 in μ-follower configuration to provide a minimum gain and a pretty low output impedance to drive the power follower.

I think there is no need for any comment regarding PF sound performance, most of you are already familiar with SE Amp or PF Amp, here attached with some pictures.

- power off;
- stand-by mode (glowing red);
- power on (glowing blue);
- internal layout.
Attached Images
File Type: jpg RIMG1050.jpg (263.0 KB, 1690 views)
File Type: jpg RIMG1044.jpg (244.4 KB, 1619 views)
File Type: jpg RIMG1046.jpg (270.2 KB, 1517 views)
File Type: jpg RIMG1047.jpg (294.6 KB, 1486 views)
File Type: jpg RIMG1037.jpg (303.6 KB, 1460 views)
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Old 20th May 2011, 01:30 PM   #1823
Bonsai is offline Bonsai  Taiwan
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Looks wonderful! nice job!
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Old 21st May 2011, 12:44 PM   #1824
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Old 21st May 2011, 12:46 PM   #1825
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Old 21st May 2011, 12:48 PM   #1826
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The power 10x3.3mF/63V
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Old 22nd May 2011, 04:19 AM   #1827
Einric is offline Einric  United States
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Default My Audiosector LM4780

Here is my finished LM4780 from Peter Daniel. It sounds very good and it really was a fun project.
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Old 22nd May 2011, 07:09 PM   #1828
alex mm is offline alex mm  Europe
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..... my not finished Goldmund amplifier .... weight ,only 11.5 kg .
Alex.
Attached Images
File Type: jpg IMG_4194.jpg (221.0 KB, 542 views)
File Type: jpg IMG_4195.jpg (244.0 KB, 540 views)
File Type: jpg IMG_4196.jpg (198.4 KB, 546 views)
File Type: jpg IMG_4197.jpg (140.4 KB, 481 views)
File Type: jpg IMG_4199.jpg (216.9 KB, 519 views)
File Type: jpg IMG_4202.jpg (108.4 KB, 423 views)
File Type: jpg IMG_4205.jpg (217.6 KB, 425 views)

Last edited by alex mm; 22nd May 2011 at 07:11 PM.
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Old 22nd May 2011, 07:14 PM   #1829
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Any photos from the lower floor?
Pretty nice so far!
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Old 22nd May 2011, 08:06 PM   #1830
alex mm is offline alex mm  Europe
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..... pictures at request ...
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