Hi Pete, Rule of thumb is never put noisy wiring (motors, transmitters, ignition) with sensitive wiring (intercom, data, low voltage stuff etc).
Comms and Transponder are very noisy when they transmit and will interfere with the position signals of the trim system and may even interfere with the operation. On a similar note elevator trim motor wiring (and flap motors, fuel pumps etc) tend to be a bit noisy so don't run them with your intercom wiring. If you have to run them together shield the elevator trim wiring (they usually aren't) and run a high quality coax. RG58 is only OK for Coms and only over shorter distance. RG400 is better and should be used for transponders or longer comms runs, RG223 is better still. The best option is to run comms along one side and trim along the other. Another note, those self adhesive pads are prone to fall off in time (especially in the Ausie sun). If you must use them, prepare the bond area as you would for any other bonding job ... Clean and abrade the area for maximum mechanical bond. I intend to make little stirrups (bonded in line with the loom) that I can use the zip-ties to mount the loom. To remove the loom simply snip the ties and replace. The stirrups can be easily made by wetting out 2 or 3 layers of BID and then laying this over a drinking straw leaving an inch or so either side flat on a plastic sheet. Once set I cut them into 1/4" strips that, from the side, look like the Omega symbol with elongated sides. Paul Smith Brisbane, AUSTRALIA pk.sm...@bigpond.net.au http://kr2spacemodulator.blogspot.com/ -----Original Message----- I'm presently installing wiring in the aft portion of the fuselage, specifically the trim actuator control wiring to the Ray Allen unit in the elevator and the com coax to the copper foil dipole that will be on the vertical stabilizer. My question is can I run them together in the same mounting clamps without having an RF interference issue do to close proximity or should they be separated?
