Plan to make one HEADCLONE<pic>

[digi01]

I make a headphone amps of clips, it is OP+BUFFER (OPA637+ BUF634) The PSU is LM317/337.
Power to OP have what is being proposed?

This is my PSU,50W AC25V /2 ,SPRAGUE10000UF /2 TRACK,LM337/317.

 

[digi01]

ALL INSIDE:

 

[planet10]

Kool... How does it sound?

dave

 

[carlosfm]

Hi digi01
Very cool, that headamp.
But allow me to make some suggestions:
The buffers are far from the op-amps.
Are they inside the feedback loop?
The op-amps (and the buffers) also seam to be poorly bypassed, the caps are far away from the supply pins...

 

[digi01]

planet10 this amp isnot completed.

Thank you carlosfm ,Your suggestions is very helpful to me.

One that is because of the op pins very small and exquisite, can't as big chip of GainClone p-p weld , so the overall arrangement is really very difficult

This is my PCB bottom :

 

[FBLEAGH]

How did you make that pcb ??
is there any reason behind those massive traces ?

 

[digi01]

I have consulted the structure of EVM PC BOARD of TI, signal ground , power ground , and shielding ground is separated.
PCB was carved with the craft knife

 

[Tomo]

Hi,

I sorta build me a HeadClone too. But I majorly cheated.

An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.

Hehe, who would have thought I would build a headphone amp with EVM board?

Tomo

 

[digi01]

Finally, I finished it.AC PSU +- 15V,single loops GAIN=11.
CHIP is OPA637AP+BUF634.
Sonud is excellent:")

 

[digi01]

update,reset GAIN=4.5,input op use two AD8610. I seperate the signal grounds and power grounds use a 5ohm resistor.
The sound of BB chip is relatively dark, fine and smooth.AD8610 can let 495 represent more enthusiasm,YEAH! I like it.

 

[Ropie]

Excellent build quality

 

[digi01]

Thanks for your comment. I really appreciate it

 

[planet10]

Sound is excellent

 

[digi01]

planet10

I know that you are very interested in the loudspeaker, I will take a picture of my LS3/5A clone next week.Please give me some suggestion then.


LUCK~

 

[planet10]

LS3/5A clone

Very interested in those... sold a lot of them in my hifi salesguy days, and listened to them lots.

dave