Author Topic: Fo-Felix EMI Filter for AC mains 120/230v  (Read 1623 times)

Offline Folsom

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Fo-Felix EMI Filter for AC mains 120/230v
« on: April 09, 2018, 01:54:11 AM »
I've got PM's about who has PCBs for the original for years. Well I decided to make one for anyone wanting to DIY. I made it so I feel it is as safe as any AC mains type of thing can be. But I updated it to be better too.



GB at DIYaudio.
« Last Edit: April 09, 2018, 01:59:15 AM by Folsom »

Offline rollo

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Re: Fo-Felix EMI Filter for AC mains 120/230v
« Reply #1 on: April 09, 2018, 07:32:27 AM »
   Nice.

charles
contact me  at rollo14@verizon.net or visit us on Facebook
Lamm - Aqua Acoustic Formula & La Scala DAC- INNUOS  - Rethm Speakers - PI Audio Uberbuss - Triode Wire Labs- Kuzma - Furutech - Audio Hungry Qualiton - Fritz Carrera speakers -Gigawatt-Arion

Offline Folsom

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Re: Fo-Felix EMI Filter for AC mains 120/230v
« Reply #2 on: May 23, 2018, 01:57:05 PM »

Offline P.I.

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Re: Fo-Felix EMI Filter for AC mains 120/230v
« Reply #3 on: May 23, 2018, 06:56:36 PM »
Round #2 is up now.


Jeremy,  very nice! You do great work on your boards and the thoughtfulness of layout.

BOOM!   :thumb:
"A man with an experience is never at the mercy of a man with an argument." - Hilmar von Campe

Offline Folsom

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Re: Fo-Felix EMI Filter for AC mains 120/230v
« Reply #4 on: December 18, 2018, 05:51:48 PM »



Offline Nick B

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Re: Fo-Felix EMI Filter for AC mains 120/230v
« Reply #5 on: December 18, 2018, 09:10:34 PM »
ICEpower 1200as2 stereo amp
Audio Hungary APR 204 preamp
KEF LS 50 speakers
Border Patrol SE dac
Auralic Aries Mini
Roon & Tidal
Don Sachs phono
Basis Ovation turntable
Graham 1.5 T tonearm
AT-ML150 cartridge
PI Audio Uber
All cables by Gary A

Offline Folsom

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Re: Fo-Felix EMI Filter for AC mains 120/230v
« Reply #6 on: December 18, 2018, 09:48:44 PM »
That is the enclosure that I was trying to get a GB going for, for the PCB boards. Although the GB wouldn't have screen print unless it was unanimous everyone wanted it.

Offline Nick B

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Re: Fo-Felix EMI Filter for AC mains 120/230v
« Reply #7 on: December 19, 2018, 01:13:42 AM »
That is the enclosure that I was trying to get a GB going for, for the PCB boards. Although the GB wouldn't have screen print unless it was unanimous everyone wanted it.

As I have an Uber from Dave, would this perform a similar function or be complementary to what the Uber does?
Nick
ICEpower 1200as2 stereo amp
Audio Hungary APR 204 preamp
KEF LS 50 speakers
Border Patrol SE dac
Auralic Aries Mini
Roon & Tidal
Don Sachs phono
Basis Ovation turntable
Graham 1.5 T tonearm
AT-ML150 cartridge
PI Audio Uber
All cables by Gary A

Offline Folsom

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Re: Fo-Felix EMI Filter for AC mains 120/230v
« Reply #8 on: December 19, 2018, 10:55:30 AM »
They have the same goal to reduce noise. The big difference is the Uber is mostly differential, and this does a lot of common mode.


Offline rollo

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Re: Fo-Felix EMI Filter for AC mains 120/230v
« Reply #10 on: May 10, 2019, 12:22:54 PM »
  Do you have any before and after measurements to support EMI and common mode noise reduction ? What is total cost without labor ?


charles
contact me  at rollo14@verizon.net or visit us on Facebook
Lamm - Aqua Acoustic Formula & La Scala DAC- INNUOS  - Rethm Speakers - PI Audio Uberbuss - Triode Wire Labs- Kuzma - Furutech - Audio Hungry Qualiton - Fritz Carrera speakers -Gigawatt-Arion

Offline Folsom

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Re: Fo-Felix EMI Filter for AC mains 120/230v
« Reply #11 on: May 10, 2019, 11:52:48 PM »
I could produce a few measurements. But I warn you that graphs on power conditioners are to be taken with a grain of salt. The AC system is so complex that you canít model or measure infinitely in one go, so you end up with something that may be a very different measurement from any other possibilities in any other stereos. So the secret is to understand what the AC types of noises and behavior are, rather than specific ones.

But really if you want to make it simple a reactance calculator will give you an approximate idea of how much noise it is possible to do some attenuation on. Just remember the caps are first so their impedance isnít high per se, compared to the inductor.

To be even more simple about it, there is no mystery whether or not CMCís work. But there are some gentle differences that become rather big when youíre listening, comparing filters like the original and mine. Did you see the difference in using a bunch of cap values and a single value? Turns out multiple values doesnít hold the desires people want, as the differences in settling times makes everything screwy.

I donít have a cost without labor for PCBs. If you mean the one-off, well that depends, are you wondering the price of one-offs or of multiples? I can assure you I donít typically not charge any labor (or markup, Iím not an altruistic billionaire). One-offs take a surprising amount of time between all the parts, assembly, enclosure planning, tooling, etc.

If you want to DIY the board+connector was $13ea and CMCís range from $8-12 or so each, caps $1~, resistors $2~, fuse stuff $1~. Other prices for parts are fairly common. Building your own is by far the most cost effective thing you can do - but that is really only something that people who wonít by commercial are willing to do.

Offline rollo

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Re: Fo-Felix EMI Filter for AC mains 120/230v
« Reply #12 on: May 14, 2019, 07:28:23 AM »
  Thanks for the answer answer. I hear a difference when using different power conditioners. Some it is tonality, others sound stage, others a non linear sound. They range in cost from $200 to 10K.
  Isolation transformers were the worst offenders sonic wise. Even the Promithius a custom wound and designed for audio produced a forward sound. The Richard Gray was bright. Have not tried a Blue Circle Isolation Transformer yet.
  The best result was using 3 dedicated lines off a sub panel with individual conditioners on each line. Separating the mono blocks and digital proved best. The sound was restricted using one dedicated line and one conditioner.
  This can get expensive fast if using mono block amps and dual mono preamp. Three digital sources as well.


charles
contact me  at rollo14@verizon.net or visit us on Facebook
Lamm - Aqua Acoustic Formula & La Scala DAC- INNUOS  - Rethm Speakers - PI Audio Uberbuss - Triode Wire Labs- Kuzma - Furutech - Audio Hungry Qualiton - Fritz Carrera speakers -Gigawatt-Arion

Offline Folsom

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Re: Fo-Felix EMI Filter for AC mains 120/230v
« Reply #13 on: June 25, 2019, 09:36:58 PM »

Offline P.I.

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Re: Fo-Felix EMI Filter for AC mains 120/230v
« Reply #14 on: June 26, 2019, 08:36:19 PM »
Cool!   :thumb:
"A man with an experience is never at the mercy of a man with an argument." - Hilmar von Campe