Please keep any replies simple as I am a microlight (Ultralight) pilot not an electrical engineer - thanks!
When using a Trig Transponder in my microlight aircraft there is a horrible click / crackle in my headset associated with the pulses from the transponder. The noise is present even when the radio is not on (i.e. just the intercom is connected between pilot and passenger)
My intercom system is Flycom and I know others with Flycom intercoms have experienced the same problem.
Have contacted the manufacturers of the intercom, Flycom. They are aware of the problem but don't have a solution.
Have tried a big aluminium "ground plane" at the point the Trig Aerial is connected to the aircraft. Have tried the ground plane with and without an earthing wire.
Have wrapped the wires to the transponder aerial in metal tape and re-routed them away from other wires.
Have tried wrapping the transponder and the intercom boxes in aluminium foil, with and without an earth wire
I also get interference to a lesser extent from flashing strobe lights. (Collision avoidance flashing lights on each wing)
I can reduce the noise by enclosing the Trig aerial with my hand - but it is very difficult to fly with one hand under the aircraft! Maybe if I take a passenger.........?
Any thoughts? Please keep them simple!
Thanks
Paul
When using a Trig Transponder in my microlight aircraft there is a horrible click / crackle in my headset associated with the pulses from the transponder. The noise is present even when the radio is not on (i.e. just the intercom is connected between pilot and passenger)
My intercom system is Flycom and I know others with Flycom intercoms have experienced the same problem.
Have contacted the manufacturers of the intercom, Flycom. They are aware of the problem but don't have a solution.
Have tried a big aluminium "ground plane" at the point the Trig Aerial is connected to the aircraft. Have tried the ground plane with and without an earthing wire.
Have wrapped the wires to the transponder aerial in metal tape and re-routed them away from other wires.
Have tried wrapping the transponder and the intercom boxes in aluminium foil, with and without an earth wire
I also get interference to a lesser extent from flashing strobe lights. (Collision avoidance flashing lights on each wing)
I can reduce the noise by enclosing the Trig aerial with my hand - but it is very difficult to fly with one hand under the aircraft! Maybe if I take a passenger.........?
Any thoughts? Please keep them simple!
Thanks
Paul