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January 16, 2021, 09:02:16 AM

Author Topic: Noise with Computers, USB DACs, and Powerline Ethernet Kits  (Read 7203 times)

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Offline Paul Birkeland

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Re: Noise with Computers, USB DACs, and Powerline Ethernet Kits
« Reply #75 on: September 29, 2020, 05:22:28 AM »
The diodes replace the IEC earth to chassis lug connection, nothing else.
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Offline mcandmar

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Re: Noise with Computers, USB DACs, and Powerline Ethernet Kits
« Reply #76 on: December 04, 2020, 03:39:33 AM »
https://www.mouser.ie/datasheet/2/358/typ_DEH-1275811.pdf

Came across these on Mouser, they are targeted at the mhz range but i wonder if they would suffice to stop ground loops in audio equipment?
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Offline DanceTomato

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Re: Noise with Computers, USB DACs, and Powerline Ethernet Kits
« Reply #77 on: January 07, 2021, 12:40:16 AM »
I accidentally ordered a few STTH2R06A, rather than STTH2R06. I have attached here: https://imgur.com/a/ieMnrfB

Can I use these in place of the the non-A variant?  E.G. something like this https://imgur.com/mVpuFLf
« Last Edit: January 07, 2021, 01:07:21 AM by DanceTomato »

Offline Paul Birkeland

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Re: Noise with Computers, USB DACs, and Powerline Ethernet Kits
« Reply #78 on: January 07, 2021, 06:56:55 AM »
I would absolutely not use surface mount diodes in this application.

Order 1N4001, 1N4002, 1N4003, 1N4004, 1N4005, 1N4006, 1N4007, UF4001/2/3/4/5/6/7.
Paul "PB" Birkeland

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Offline Paul Birkeland

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Re: Noise with Computers, USB DACs, and Powerline Ethernet Kits
« Reply #79 on: January 07, 2021, 07:11:35 AM »
https://www.mouser.ie/datasheet/2/358/typ_DEH-1275811.pdf

Came across these on Mouser, they are targeted at the mhz range but i wonder if they would suffice to stop ground loops in audio equipment?
They are 25 freaking dollars each if you buy 50 at a time!
Paul "PB" Birkeland

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Offline Deke609

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Re: Noise with Computers, USB DACs, and Powerline Ethernet Kits
« Reply #80 on: January 07, 2021, 09:14:43 AM »
They are 25 freaking dollars each if you buy 50 at a time!

Neat idea though.  And if they actually work for breaking ground loops, they might be worth it for a lot of people.

One could also just install a tiny inductor between the earth ground and chassis ground, but I can't find a high current rated one on Mouser. These are all a lot cheaper than the Schurter thingy, but none are rated for much more than 5A, and most for a lot less: http://www.mouser.com/Passive-Components/Inductors-Chokes-Coils/Fixed-Inductors/_/N-wpczZ1yzvvqx?P=1z0z819Z1z0z7l5Z1z0wohhZ1yzjx1iZ1z0wqhyZ1z0jky5Z1z0wqh6Z1yzjx12Z1z0wognZ1z0wqobZ1z0wqgxZ1yyt8gaZ1z0wqhwZ1yztq3uZ1yyt8f1Z1z0woglZ1z0wqo9Z1yzmpecZ1z0wkc2Z1z0j7djZ1z0wqhsZ1yxadcvZ1z0j5rrZ1z0wogjZ1z0wqo1Z1yztpvpZ1yi47jgZ1z0wkc1Z1z0wqhqZ1z0jkw7Z1yu90k7Z1yzuwe3Z1z0woghZ1z0wqo0Z1z0woh9Z1yvgg2oZ1yzuvkkZ1z0wqhoZ1yzakszZ1yxh8woZ1yy85mjZ1y9gfh8Z1z0wogfZ1z0wqppZ1z0wpgmZ1yu90l4Z1z0wfhjZ1z0wqhnZ1yzuvk8Z1yy7e5iZ1z0wqn1Z1yzsc00&Keyword=inductor&FS=True

I'm not sure if that would pass electrical code requirements.  I'm guessing one probably needs a current rating on the ground connection that is at minimum the same current rating as the breaker at the panel (e.g., 15A or 20A).

cheers, Derek
« Last Edit: January 07, 2021, 09:17:00 AM by Deke609 »
Derek
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Roon Intel NUC ->  Yggdrasil DAC -> BeePre (w/ BeeQuiet and EML 300B)  -> Kaiju (w/ DCFil and EML 300B) or Stereomour II (2A3 [EML Mesh] and 45 Conversion [EML 45B])  -> Audeze LCD4

Offline Paul Birkeland

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Re: Noise with Computers, USB DACs, and Powerline Ethernet Kits
« Reply #81 on: January 07, 2021, 09:45:42 AM »
I would bet that those would pass 20A and pop a circuit breaker pretty easily. 
Paul "PB" Birkeland

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Offline Deke609

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Re: Noise with Computers, USB DACs, and Powerline Ethernet Kits
« Reply #82 on: January 07, 2021, 10:13:31 AM »
Fair point - it only needs to handle the current for a split second.
Derek
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Roon Intel NUC ->  Yggdrasil DAC -> BeePre (w/ BeeQuiet and EML 300B)  -> Kaiju (w/ DCFil and EML 300B) or Stereomour II (2A3 [EML Mesh] and 45 Conversion [EML 45B])  -> Audeze LCD4

Offline Paul Birkeland

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Re: Noise with Computers, USB DACs, and Powerline Ethernet Kits
« Reply #83 on: January 07, 2021, 10:17:43 AM »
Still, I don't think these would get the desired result.  For audible noise, these would be a dead short (it's a piece of wire after all) and would only present significant impedance to high frequency noise that wouldn't otherwise be audible, and that we would otherwise want to shunt to earth as effectively as possible.
Paul "PB" Birkeland

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Offline Deke609

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Re: Noise with Computers, USB DACs, and Powerline Ethernet Kits
« Reply #84 on: January 07, 2021, 10:35:01 AM »
Yeah, that makes sense. they'd only be appreciably reactive in the MHz range.  The application example diagram in the Schurter datasheet shows them used with a mainframe computer and peripherals.
Derek
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Roon Intel NUC ->  Yggdrasil DAC -> BeePre (w/ BeeQuiet and EML 300B)  -> Kaiju (w/ DCFil and EML 300B) or Stereomour II (2A3 [EML Mesh] and 45 Conversion [EML 45B])  -> Audeze LCD4

Offline DanceTomato

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Re: Noise with Computers, USB DACs, and Powerline Ethernet Kits
« Reply #85 on: January 07, 2021, 11:33:21 PM »
I would absolutely not use surface mount diodes in this application.

Order 1N4001, 1N4002, 1N4003, 1N4004, 1N4005, 1N4006, 1N4007, UF4001/2/3/4/5/6/7.

Thank you Paul B, I have ordered some 1N4007 (1A/1200V) following your advice.