Trying to help my hangar neighbor diagnose some odd issues in his plane.
I'm going there tomorrow with my voltmeter.
he has a split bus bar with one side showing 12.3 volts and the other showing 14.1 while the engine is running.
He shows a voltage drop of .5 volts on the 12.3 side when the push to talk switch is depressed.
also has some alternator whine when transmitting on the #1 radio.
when receiving both radios are quiet.
anyone have any thoughts??
I'm going to check for proper grounds, & the headset jacks for isolation washers.
Going to check the alternator for ripple voltage/bad diode.
Will check the voltage regulator too. Seems to me both electrical busses should be regulated the same. How they differ by 1.8 volts is odd.
I'm going there tomorrow with my voltmeter.
he has a split bus bar with one side showing 12.3 volts and the other showing 14.1 while the engine is running.
He shows a voltage drop of .5 volts on the 12.3 side when the push to talk switch is depressed.
also has some alternator whine when transmitting on the #1 radio.
when receiving both radios are quiet.
anyone have any thoughts??
I'm going to check for proper grounds, & the headset jacks for isolation washers.
Going to check the alternator for ripple voltage/bad diode.
Will check the voltage regulator too. Seems to me both electrical busses should be regulated the same. How they differ by 1.8 volts is odd.