I agree!
I just made another post and I definitely agree the transformers are the
better route over active devices for long audio runs. The active devices are
best suited for interfacing un-balanced devices to balanced connections in a
production or control room.
I am thinking of running a cable that has several shielded audio pairs between
the two locations to give me room for future needs and to carry ptt and cor
signals.
This is an example of what I am thinking of using for cable...
http://www.gepco.com/products/proav_cable/analog_audio/multi_gf22_M.htm
-- Original Message --
Received: Sat, 27 Feb 2010 09:21:39 AM PST
From: Al Wolfe k...@arrl.net
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Digest Number 7130
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
