strange com fault
Thread Starter
Joined: May 2001
Posts: 1,692
Likes: 3
From: Escrick York england
strange com fault
I have a king com on a piston heli
on the ground it's ok but when in the air it gives background noise and if I alter the throttle on the piston engine it sounds as if I can hear the engine accelerate and buzzes faster
If someone transmits I can hear them perfect and I can transmit perfect
Any one got any ideas
on the ground it's ok but when in the air it gives background noise and if I alter the throttle on the piston engine it sounds as if I can hear the engine accelerate and buzzes faster
If someone transmits I can hear them perfect and I can transmit perfect
Any one got any ideas
Joined: Dec 2014
Posts: 13
Likes: 0
From: near england
Sound to me like you've got either alternator or ignition break through.
Have a chat with your avionics engineer to see if you can improve the suppression on the power supply to the radio/intercom!
The dog.
Have a chat with your avionics engineer to see if you can improve the suppression on the power supply to the radio/intercom!
The dog.
Joined: Jun 2007
Posts: 436
Likes: 0
From: NSW
Should be a capacitor on or near the alternator. This could be U/S. The buzz will increase with RPM. If you were in a fix wing at buzzing would cut out at about 2200rpm as it exceeds your limits of hearing.
Get a avionics guy to test that capacitor. Easy fix.
Get a avionics guy to test that capacitor. Easy fix.
