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Headphone amp  12AU7 art PCB Design
Headphone amp  12AU7 art PCB Design
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Old 15th March 2012, 05:07 PM   #1
tigersilver is offline tigersilver  Thailand
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Default Headphone amp 12AU7 art PCB Design

Headphone amp 12AU7 art PCB Design
a design published over at DIY Audio Projects NP-100v12: 12AU7 (ECC82) / IRF510 Headphone Amp
transformer 12V 1-3A
10000uF x2
0.1 UFx2
regulator MC7812

I'm very bad language.
Sorry, for a little less detailed.
Attached Images
File Type: jpg DSC02496.JPG (142.8 KB, 809 views)
File Type: jpg DSC02498.JPG (172.9 KB, 772 views)
File Type: jpg DSC02506.JPG (95.3 KB, 732 views)
File Type: jpg DSC02507.JPG (160.6 KB, 706 views)
File Type: jpg DSC02509.JPG (151.6 KB, 717 views)

Last edited by tigersilver; 15th March 2012 at 05:18 PM.
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Old 30th March 2012, 03:55 PM   #2
Osvaldo de Banfield is offline Osvaldo de Banfield  Argentina
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Location: Barrio Garay,Almirante Brown, Buenos Aires, Argentina
I strongly dislike mixing tubes and sand in the same circuit. Why a 12AU7 in between MOSFETīs, and ICīs?. Why not to put a JFET in place... and maintain all solid state? Or make a WCF and use only tubes?
Osvaldo F. Zappacosta. Electronic Engineer UTN FRA from 2001.
Argentine Ham Radio LW1DSE since 1987.
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Old 30th March 2012, 05:24 PM   #3
qusp is offline qusp  Australia
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yeah because Erno Borbely really didnt have a clue what he was doing..... neither was the blue hawaii electrostatic headamp a passable idea (project in original DIY form), Kevin Gilmore and John Broksie clearly have rocks in their heads....

I think use whatever is convenient and does the job well.

nice work on the PCB art tigersilver! ive often thought about mixing my graphic design/lithography with electronics to do something like that, but i do worry a bit about eddie currents and strange loops caused by the odd shapes

no good? its thought by many to be one of if not THE best headphone amp available and I for one cannot wait to hear my friends fantastic build with his O2 down the bottom (nattonrice, also a member here) kudos Tom its one of the most impressive headphone amp builds ive ever seen

I give you the Blue Hawaii and Nattonrice's slightly modified DIY version using original BHSE PCBs but with a solid state CCS load

Click the image to open in full size.Click the image to open in full size.Click the image to open in full size.Click the image to open in full size.

Last edited by qusp; 30th March 2012 at 05:50 PM.
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Old 16th May 2012, 10:21 AM   #4
Serg84 is offline Serg84
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qusp, very nice amp! I want to ask your advice on this amp. I am having serious problems with his work. Posted in pm.
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Old 12th August 2013, 06:12 PM   #5
roline is offline roline  United States
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I've done many sand/glass headphone amps, They all worked very well and were black hole quiet, no noise. I tried a low voltage tube differential input mosfet output opamp approach and it is fun to listen too. It uses the tubes heaters as the pull down current on the output mosfet, so the heaters runs at 12 volts with audio AC on it.
I've also done hi voltage tube and Mosfet output designs with DC supplies for the heaters and finally decided on trying a PP tube style amp, should be able to squeeze 1 watt class A out of it.
There are so many ways to accomplish the same goal. Each will have a design bias and may even criticize those who do not follow their beliefs. If you have an idea, try it you may be surprised at the outcome. Always enjoy the process of creation!
Attached Images
File Type: jpg pic tube.jpg (136.8 KB, 85 views)
File Type: png mod60.png (46.6 KB, 169 views)
File Type: jpg plan-b2a.jpg (80.9 KB, 164 views)
File Type: jpg hd1b.jpg (168.7 KB, 101 views)
File Type: jpg 6KR8 PP HEAD-AMP.jpg (879.4 KB, 101 views)
SO many tubes, SO little time!!!
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