Electronics > Beginners
Phono cable and common mode noise filter?
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JohnnyMalaria:

--- Quote from: C on May 31, 2018, 08:04:09 pm ---Note that electronics can be better then a transformer for audio.

C

--- End quote ---

That's the very subject of the article I linked to. Definitely worth a read.
JohnnyMalaria:
Balanced input and output circuits using commercially available line receiver ICs:

https://www.diyrecordingequipment.com/pages/balanced-input-output-assembly-guide

https://octopart.com/ina134pa-texas+instruments-55433408
C:

Good differential amps are differential in & differential output.

TI calls these Fully differential amps

C
FriedMule:
As always a giant knowledge you all share!! Thanks, really thanks!! :-)

What would you recommend now then, a cap from lead to case/ground, an inductor, ferrite ring or something else, to remove 30khz and up?
C:

A filter is not magic.
When you add something, most times you effect all signals.
When you do a 30k low pass filter that is just effecting the higher more then below.

So first question is how do you know you have a problem?
You can not hear 30k so how do you know it is there and how much are you measuring.

I would expect the output of a CD drive to be good.

C
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