On Mar 12, 5:56*pm, "Phil Allison" wrote:
"William Sommer****** Fool "

5mV is down in the range of microphones and phono pickups. I would not run
such a signal through 35' of coax.

** Co-ax works perfectly with microphones.

* *Every bit as good as shielded twisted pair cable.

.... *Phil

Using physically realizable materials, the only signal carrying system
one can construct in a manner that will be the most immune to external
noise sources is a shielded balanced twisted
pair system. Coax is prone to adding noise to the signal, since the
shield has impedance, carries the signal, and therefore can add noise
to the signal as the shield carries noise.

However, even poorly made twisted pair cable can actually add noise to
the signal as the shield attempts to do its function. For example,
Belden's high quality HDMI cable, if used to carry analog, only
shieldls in the 35 to 60dB range. Of course its worse at the higher
frequency range.

Robert Macy, PE