Is this really what you'd expect from an audio balun
Don Pearce wrote:
On Sun, 05 May 2013 23:04:35 -0700, isw wrote:
Looks OK to me. It's configured as a series common mode stopper.
What's the problem?
Will this design eliminate ground loop problems? My concept of
baluns was that
they isolated the two ends by placing them on opposite windings of
a transformer. I am no expert, which is why I asked.
That is a different thing. You need a transformer to kill a ground
loop entirely, but yes, provided there is enough inductance in the
coils this will still make a good job of getting rid of hum from a
ground loop.
If there's enough inductance to attenuate 60 (or 50) Hz from the
power line, why won't it do the same for similar frequencies in the
desired signal?
No, because of the way the windings are arranged their inductances
cancel each other out for the audio signal, but not for the induced
hum.
The windings being on a transformer arranged so that common mode noise cancels,
and the signal doesn't?
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