John,
You will save yourself a lot of grief by using real transformer
isolation at each end in addition to balanced lines. The $12 dollar ones at
RS will work fine for communication audio frequencies. If you want to go
first class find some WE111 repeat coils.
For wire CAT 5 will work and give you four pairs to play with. Some E
and M signaling or COR maybe.?
Al, K9SI, retired BC engineer (now occasional highly paid consultant)
LOOONG audio runs
Posted by: "JOHN MACKEY" jmac...@usa.net jmackey_usa_net
Date: Fri Feb 26, 2010 10:49 pm ((PST))
I have a odd situation where I need to run long audio cables between my
repeater controller and two repeaters. In this case, the repeater
controller
will be connected to 2 repeaters in the same cabinette. The other two
repeaters will connected thru about 140 feet of wiring to the other side of
a
building. I am thinking of using balanced audio wires for the long runs and
using Henry Engineeering boxes to convert between balanced/un-balanced at
each
end.
Anyone ever done long audio runs like this? Am I over engineering it and
unbalanced will be good enough?
I use the Henry Engineering boxes for several audio conversions in
broadcasting, here is a link for what they are:
http://www.henryeng.com/matchbox.html
