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Old 4th May 2007, 02:40 PM   #11
sandyK is offline sandyK  Australia
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Unfortunately, they are scanned magazine pages, so email is best if you want them.
SandyK
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Old 4th May 2007, 04:51 PM   #12
MaxS is offline MaxS  France
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Default Let's try a TPA6120

Hello,

If you're not against SMD chips, you can try a TPA6120 chip. Several threads talk about it on this board.
Or hydrid, solid-state or tube-based design. http://www.headphoneamp.co.kr/ftp/sijosae/Gallery/

Thanks,

Max
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Old 4th May 2007, 05:18 PM   #13
Ayne is offline Ayne  Pakistan
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Infact i am intrested in "sandyK's design picture"

sandyK if u load ur Picture on Here

Thanks.
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Old 4th May 2007, 10:12 PM   #14
sandyK is offline sandyK  Australia
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Default Headphone Amplifier (circuit needed)

The complete articles are included with the Jaycar kits KC5417 KC5418
I hope some of the SC article arrived. IMHO, the Headphone Amplifier is very high quality,even more so after AD8066 and 2SC5171 and 2SA1939 mods.
SandyK
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Old 4th May 2007, 10:44 PM   #15
sandyK is offline sandyK  Australia
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Default Headphone Amplifier (circuit needed)

2SA 1939 should have read 2SA1930
BTW, Silicon Chip magazine is a world class electronics magazine. I have bought every single issue since it's inception.
If anyone is interested, the May 2007 issue contains the first part of a 20W Class A project. They claim it has the lowest distortion of any design ever published. I am using a modified version of their original 15W Class A design.
Us Aussies are very proud of Silicon Chip magazine !
SandyK
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Old 5th May 2007, 02:59 AM   #16
awpagan is offline awpagan  Australia
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Default Re: Headphone Amplifier (circuit needed)

Quote:
Originally posted by sandyK

I am using a modified version of their original 15W Class A design.
Us Aussies are very proud of Silicon Chip magazine !
SandyK

How did you modify your's?
I up'd the volt and bias on mine long ago, still works
sweet sounding amp, up'd power adds more too the lower end.


as for the headphone amp see
http://headwize.com/ubb/showpage.php...d=6605&fpage=1

much better than the SC one
also if your used SC preamp try AD's in place of the opa2134's

allan
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Old 5th May 2007, 03:01 AM   #17
sandyK is offline sandyK  Australia
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Default Headphone Amplifier (circuit wanted)

Ayne

Hopefully there should now be a few more images (?)

SandyK
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Old 5th May 2007, 03:50 AM   #18
Daveis is offline Daveis  United States
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I see some possible leads at

http://www.amb.org/audio/beta22/

I have the M3 MMM M^3

http://www.amb.org/audio/mmm/

Wondering how the B22 compares with the "Cavalli-Kan Kumisa III" ??

And if either is much better than the M3
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Old 5th May 2007, 03:57 AM   #19
sandyK is offline sandyK  Australia
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Default re Headphone Amplifier (circuit needed)

Re Class A Amplifier changes
Among other things, I used dual regulated power supplies and a shielded Toroidal transformer with dual windings, as well as 2 bride rectifiers. I replaced the TIP41/TIP42 series pass transistors in the REg. PSUs with the faster MJE15030/MJE15031 as well. I also used the wider bandwidth 1302/3281 in place of the MJL devices.There were numerous other changes too.
SandyK

Allan
I have sent you an email. So you may have to check your spam filter.
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Old 5th May 2007, 04:05 AM   #20
RSK is offline RSK  Malaysia
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Default Class A headphone amp

Try this link (http://home.no.net/andiha/articles/a...adphoneamp.htm).

I have built it and it sounds awsome.

RSK.
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