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Old 5th August 2010, 03:01 PM   #1521
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Quote:
Originally Posted by andrewlebon View Post
hi biyiers
greetings my 2.1 amp winding my toroidal primary complete my aluminum cabinet with usb input 2.1 amplifier 300 watts each + 600 watts 2 channels bridged

thanking you
Andrew lebon
That is a nice monster there! The transformer looks like a commercial one Very well build. Nice job.
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Old 17th August 2010, 11:39 AM   #1522
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YouTube - ADCOM GFA555 UPGRADE
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Old 24th August 2010, 01:47 AM   #1523
amc184 is offline amc184  New Zealand
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This is my new phono preamp. I designed it for playback of a friend's LP collection, it can equalise records with the RIAA, AES, FFRR and NARTB curves. It uses both series and shunt regulation to feed a single opamp based gain stage with an active filter, including a BUF634 current buffer to allow the opamp to drive the capacitive load the filter presents.
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Old 24th August 2010, 08:41 PM   #1524
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Default New JLH class A headphone amp

Hi

Please find my newly constructed JLH class A headphone/preamp. The unit has a remote control volume control and will be upgraded with better op amps soon. The unit sounds 1st class, it also has passive and active line out.

regards

JamesFeline

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Old 26th August 2010, 09:55 AM   #1525
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Originally Posted by lineup View Post
Nice work, Milan
Academia PCB mounted:

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Everybody!
Make a visit to moamps wonderful website!
He has got many amplifiers images. Solid State Amps & Tubes Amps.
You will like it ... for sure
http://www.moxtone.com/

INSIDE CASE Top View - of his Academia Amplifier



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.... and I wouldn't be very surprised
if it turned out that me lineup has got something to do with
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hi sir can u give me pcb layout nd circut of it ..?
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Old 27th August 2010, 06:25 PM   #1526
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hi sir can u give me pcb layout nd circut of it ..?
This is not twitter !! grammar counts.
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Old 27th August 2010, 06:37 PM   #1527
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Originally Posted by amc184 View Post
This is my new phono preamp. I designed it for playback of a friend's LP collection, it can equalise records with the RIAA, AES, FFRR and NARTB curves. It uses both series and shunt regulation to feed a single opamp based gain stage with an active filter, including a BUF634 current buffer to allow the opamp to drive the capacitive load the filter presents.
Wow, really georgeous. Can we see a picture from the top? I'm specially interested in how can you have fitted a series regulator, a shunt regulator and the equalization section in such an small place!

And a very convenient button to isolate it from earth
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Old 27th August 2010, 10:38 PM   #1528
amc184 is offline amc184  New Zealand
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I can send you the schematic (send me a PM), it is based on a design by Walt Jung, published in his book 'Op-Amp Applications'. I took his topology, but applied different power supplies, different active devices and an adjustable Lipshitz network.

I gave the phono its first proper test last night, and it was great to finally hear AES, NARTB and FFRR vinyl with its proper EQ curve.

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And a very convenient button to isolate it from earth
I don't know what you mean by that, there's no ground lift button.
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Old 28th August 2010, 08:52 AM   #1529
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Sorry, I was referring to James Feline amplifier when referring to earth lifting

Yes, some schematics would be really helpfull. I would really grateful to see the design
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Old 2nd September 2010, 02:04 PM   #1530
mauto is offline mauto  Italy
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My work : Gainclone LM3875
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