I have to stick my nose into this one. Use balanced audio ESPECIALLY if there is any other strong RF at or near your site. 140 feet is a good AM broadcast antenna! Shield grounds for your cable should be at one end (best bet is at the controller for everything!) It also might be wise to snap on an RF choke at each end of the cable, after all ... you don't need any strong RF on your analog signaling lines to get rectified somewheres and present you with a locked up or in-operable repeater.
my 0.02 James WJ1D JOHN MACKEY wrote: > 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: >
