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E-MU 0404 usb 2.0 and some "artifacts peaks" on left channel
E-MU 0404 usb 2.0 and some "artifacts peaks" on left channel
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Old 3rd August 2015, 05:35 AM   #71
Wirehead_be is offline Wirehead_be  Belgium
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Hi lemon; no; I do not have spikes. I used solid wire, and twisted the conductors tightly together.
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Old 3rd August 2015, 09:07 AM   #72
lemon is offline lemon  Greece
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Thanks for the info.
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Old 6th August 2015, 04:55 PM   #73
lemon is offline lemon  Greece
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I proceed to change all the stock left input opa's and the output opa's of EMU with the LME49720.
My purpose was the THD improvement.
There is any significant improvement to THD, except the D2 measuring at the step test.
For full information about this see at http://www.diyaudio.com/forums/equip...ml#post4412914
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Old 4th November 2015, 04:28 AM   #74
deliver08 is offline deliver08  China
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Many thanks to sidiy!
I bought one e-mu 0404 usb2.0 few days ago. I will change the layout follow you.
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Old 24th March 2019, 12:02 AM   #75
Rax is offline Rax  United States
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Hi all,
In trying to implement Sidiy's mod, I lost the left pad of R151. Any known cure?
I'm learning SMD work and I guess first lesson didn't go too well.
Thank you!

On an alternate plan, is anyone having done the modification willing to sell their modified EMU 0404? I think I had enough SMD teachings for a while.

Last edited by Rax; 24th March 2019 at 12:24 AM. Reason: added request
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Old 24th March 2019, 01:14 PM   #76
Rax is offline Rax  United States
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Quote:
Originally Posted by Rax View Post
Hi all,
In trying to implement Sidiy's mod, I lost the left pad of R151. Any known cure?
I'm learning SMD work and I guess first lesson didn't go too well.
Thank you!

On an alternate plan, is anyone having done the modification willing to sell their modified EMU 0404? I think I had enough SMD teachings for a while.
Connect to C101, obviously. Any thoughts on optimal size of wire? I'm traumatized after exfoliating the R151 pad.
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Old 24th March 2019, 10:33 PM   #77
Rax is offline Rax  United States
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Originally Posted by Rax View Post
Connect to C101, obviously. Any thoughts on optimal size of wire? I'm traumatized after exfoliating the R151 pad.
Got it done. Used 26AWG wire, went straight to C101. See enclosed pics. Maybe routing could be a bit better, though I don't think the current performance can be improved much at all as far as this particular issue goes.

Was really bummed yesterday, but now I'm a very happy camper. Left channel cleaned up very nicely.
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Old 8th July 2019, 06:12 PM   #78
PCRepair is offline PCRepair
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I cleaned the power supply oy (6v) with an example in the photo before and after, installed Sanyo low esr and parallelly shunted NP0 0.1 with ceramics. Pulsations of steel 1.2 mV (rms) (Sorry for my not always correct expression, I am writing through a translator, I am from Ukraine)
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Last edited by PCRepair; 8th July 2019 at 06:33 PM.
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