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GB: Round #2; Fo-Felix EMI Filter for AC mains 120/230v; By Folsom
GB: Round #2; Fo-Felix EMI Filter for AC mains 120/230v; By Folsom
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Old 11th July 2018, 10:58 PM   #91
AmpUtator is offline AmpUtator  United States
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Old 11th July 2018, 11:11 PM   #92
Skip Pack is offline Skip Pack  United States
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I would like to get 4 boards.

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Old 12th August 2018, 11:29 PM   #93
pinnocchio is offline pinnocchio  Canada
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4 boards as well for me

Thanks
Do
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Old 12th August 2018, 11:42 PM   #94
Vunce is offline Vunce  United States
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GB: Round #2; Fo-Felix EMI Filter for AC mains 120/230v; By Folsom
Hi Do,

Fo-Felix GB3 is active here:

GB: Round #3; Fo-Felix & GB #1 AC Receptacle Enclosure
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Old 12th August 2018, 11:50 PM   #95
pinnocchio is offline pinnocchio  Canada
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thanks!
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PREAMPs : AMB α10 + USSPA | Bal DCB1 | Bal LDR3x | AMPs: AMB β24 | USSA3 & 5 | TGM8 | VZ Audio NS OPS | NX Amp | FC-100
DACs : TPA BII + OPC's NTD1 I/V | Signalyst DSCv2 | Mirand AK4490 + Discrete Output Speakers : Troels Gravesen ATS-4 | Sagwee LT V3
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Old 16th August 2018, 09:06 PM   #96
saf is offline saf  Portugal
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Jeremy

I need some help here.
I have my first board built and tested it yesterday, seems ok.
I am using the Comoco 4018 on this one.

I know i have some serious fluctuations in noise at my house, but mains is steady 235V.
I am using the Felix on my poweramp and it stoped working tonight.
I went and measure, and despite i have 234V at mains socket, after the Felix i read 221V !!?

I can also read a difference of 5V from Neutral to Ground ( after the Felix). But i read 1.5V from Neutral to Ground at Mains Socket.
What gives ? Something wrong with my comoco or caps ?
Thank you for helping
Cheers

Last edited by saf; 16th August 2018 at 09:09 PM.
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Old 17th August 2018, 05:37 PM   #97
Destroyer OS is offline Destroyer OS  United States
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GB: Round #2; Fo-Felix EMI Filter for AC mains 120/230v; By Folsom
Hi,

Are you using GB #1 or GB #2 boards? Pictures would be very helpful.

Does it measure 221v with the amp plugged in/on, or stand alone without anything but the Fo-Felix plugged in?

Please take more measurements. What is the resistance from one side of the Fo-Felix to the other on L and N? What is the measurement between the input socket L and N to the inputs on the Fo-Felix? The output to the Fo-Felix?

What size transformer on the amp? What class is the amp?
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Old 17th August 2018, 06:42 PM   #98
saf is offline saf  Portugal
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I have the GB#2 boards

At the mains socket i have 235V AC - between N and L
I have the Felix installed in the powercord so if i plug in this powercord, at the IEC side i read 221V AC - between N and L.

Resistance between AC HOT plug and IEC HOT is 0.00 ohms (the 2 sides of the felix)

Resistance between AC NEUTRAL plug and IEC NEUTRAL is 1.04 Megaohms.

The amp is no issue here, the problem is that it does not turn on because it cant deal with such low voltage.
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Old 17th August 2018, 06:50 PM   #99
saf is offline saf  Portugal
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Found the problem...i should have dismantled it sooner.
Click the image to open in full size.

Now...why did the bleed resistor blew up ?
Is it because my amplifier is 400W and draws a lot of current ?
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Old 17th August 2018, 07:28 PM   #100
Destroyer OS is offline Destroyer OS  United States
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GB: Round #2; Fo-Felix EMI Filter for AC mains 120/230v; By Folsom
Wow.

There's no fuse... The Comoco only works with a fuse. You were trying to power your amp through a 1/2w resistor.

Last edited by Destroyer OS; 17th August 2018 at 07:30 PM.
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