It's my AD815 headamp

Kochkurov Maxim · 6th May 2006, 06:36 AM

It's my new AD815 headamp

Kochkurov Maxim · 6th May 2006, 06:38 AM

Schematic

Professor · 6th May 2006, 08:12 AM

À òàêèå ïëàòû âû ó íàñ äåëàåòå? )) âñìûñëå, â Ðîññèè?

Kochkurov Maxim · 6th May 2006, 08:27 AM

Äà, äåëàþ, â íàëè÷èè èìåþòñÿ 10 ïëàò ïîä ýòîò óñèëèòåëü. Áîëåå ïîäðîáíî òóò

http://www.vegalab.ru/forum/showthread.php?t=5842

earsandeyes · 6th May 2006, 12:35 PM

Maxim,

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

regards,

E&E

Russ White · 6th May 2006, 04:02 PM

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

veteran · 8th May 2006, 07:27 PM

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?

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

peranders · 8th May 2006, 09:03 PM

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?

Gcollier · 9th May 2006, 09:09 PM

(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.

Professor · 10th May 2006, 11:11 AM

À ñêîëüêî áóäóò ñòîèòü äâå ïëàòû è íàáîð äåòàëåé ïîä íèõ ?

6th May 2006, 08:12 AM	#3
Professor diyAudio Member Join Date: Sep 2005 Location: Electrostal, Moscow region	À òàêèå ïëàòû âû ó íàñ äåëàåòå? )) âñìûñëå, â Ðîññèè? __________________ http://mymegahobby.jimdo.com/

6th May 2006, 04:02 PM	#6
Russ White diyAudio Member Join Date: Jan 2005 Location: Nashville, TN, USA	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 __________________ Less pulp more juice Twisted Pear Audio.

8th May 2006, 07:27 PM	#7
veteran diyAudio Member Join Date: Feb 2004 Location: Poland	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? This is another nice current feedback amplifier. This time from Linear __________________ Simple audio solutions blog.unisonus.com

8th May 2006, 09:03 PM	#8
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	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? __________________ /Per-Anders (my first name) or P-A as my friends call me

9th May 2006, 09:09 PM	#9
Gcollier diyAudio Member Join Date: Mar 2003 Location: Windsor	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. __________________ If you take something apart and put it back together again enough times, eventually you will have two of them.


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6th May 2006, 08:27 AM	#4
Kochkurov Maxim diyAudio Member Join Date: Dec 2003 Location: Russia	Äà, äåëàþ, â íàëè÷èè èìåþòñÿ 10 ïëàò ïîä ýòîò óñèëèòåëü. Áîëåå ïîäðîáíî òóò http://www.vegalab.ru/forum/showthread.php?t=5842

6th May 2006, 12:35 PM	#5
earsandeyes diyAudio Member Join Date: Feb 2004 Location: utrecht	Maxim, Can you ellaborate on your headamp. Do I understand from your russianspeak webforum that there has been a "groupbuy"? regards, E&E

10th May 2006, 11:11 AM	#10
Professor diyAudio Member Join Date: Sep 2005 Location: Electrostal, Moscow region	À ñêîëüêî áóäóò ñòîèòü äâå ïëàòû è íàáîð äåòàëåé ïîä íèõ ? __________________ http://mymegahobby.jimdo.com/

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