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Old 6th May 2006, 06:36 AM   #1
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Default It's my AD815 headamp

It's my new AD815 headamp
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Old 6th May 2006, 06:38 AM   #2
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Schematic
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Old 6th May 2006, 08:12 AM   #3
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А такие платы вы у нас делаете? )) всмысле, в России?
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Old 6th May 2006, 08:27 AM   #4
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Да, делаю, в наличии имеются 10 плат под этот усилитель. Более подробно тут

http://www.vegalab.ru/forum/showthread.php?t=5842
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Old 6th May 2006, 12:35 PM   #5
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Maxim,

Can you ellaborate on your headamp. Do I understand from your russianspeak webforum that there has been a "groupbuy"?

regards,

E&E
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Old 6th May 2006, 04:02 PM   #6
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Now thats what I call progress. Great work!!! Lets see how long before this catches the ire of the "AD815 gate keeper". After all he used it first, and he requires his permission. Just kidding.

Very well done ciruit I like the servos and the SMD layout. Excellent execution. A real insipration.

Thanks for sharing. I am sure it is a great headamp.

Cheers!
Russ
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Old 8th May 2006, 07:27 PM   #7
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Great work Maxim! I like the PS section.

I'm listening to something similar and AD815 is a very good amplifier for high(er) impedance headphones.

DC Servo is a must for AD815 ARB version. I have got about output
300mV offset voltage without it . Trough hole is better but it's hard to find.

AD815 is a current feedback amplifier so feedback resistors values should be keep as low as possible.

And what with the clik and pop noise on startup and turn off?

Click the image to open in full size.

This is another nice current feedback amplifier. This time from Linear

Click the image to open in full size.
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Old 8th May 2006, 09:03 PM   #8
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Mr. Maxim, a very nice looking pcb.

Have you seen my QRV-07? Similar design but I have used TPA6120 instead.

I notice at the right phono connector that you have a "meander" trace. Why is that?

Do you have a groundplane on solderside?
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Old 9th May 2006, 09:09 PM   #9
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Excellent job! This is a very nice implementation of this super copyrighted registered trademarked, all rights reserved current feedbacck opamp (he he I couldn't resist) The PCB design is nice and professional! How does that servo seem to handle the DC offset across the entire range of the pot?

G.
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Old 10th May 2006, 11:11 AM   #10
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А сколько будут стоить две платы и набор деталей под них ?
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