Plan to make one HEADCLONE<pic>

digi01 · 21st May 2003, 01:09 AM

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 · 21st May 2003, 01:14 AM

ALL INSIDE:

planet10 · 21st May 2003, 06:08 AM

Kool... How does it sound?

dave

carlosfm · 21st May 2003, 03:27 PM

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 · 22nd May 2003, 01:53 AM

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 · 22nd May 2003, 03:34 AM

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

digi01 · 22nd May 2003, 06:43 AM

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 · 26th May 2003, 12:47 AM

Hi,

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

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

Tomo

digi01 · 1st April 2004, 05:55 AM

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

digi01 · 1st April 2004, 06:00 AM

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.

21st May 2003, 06:08 AM	#3
planet10 frugal-phile(tm) diyAudio Moderator Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III Blog Entries: 5	Kool... How does it sound? dave __________________ community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi p10-hifi forum here at diyA

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21st May 2003, 03:27 PM	#4
carlosfm Banned Join Date: Mar 2003 Location: Lisbon, Portugal	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...

22nd May 2003, 03:34 AM	#6
FBLEAGH diyAudio Member Join Date: Sep 2001 Location: Sydney, australia	How did you make that pcb ?? is there any reason behind those massive traces ?

26th May 2003, 12:47 AM	#8
Tomo diyAudio Member Join Date: Jun 2002	Hi, I sorta build me a HeadClone too. But I majorly cheated. Hehe, who would have thought I would build a headphone amp with EVM board? Tomo