Noise/sound from generator

by Przemysław Wiśniewski in 912 / 914 Technical Questions 10 years ago

Hi. For last month I can hear in my krt-2 radio awful sound, frequency depends on rpm and I found that if I'll pull generator circuit breaker sound disappears.

Where I should look for the problem? Grounds looks fine, regulator can be faulty?
I have also 33000uF capacitor.

Re: Noise/sound from generator

by Roger Lee » 10 years ago

Roger Lee

131 5.38k 5.44k

This issue could be in several places,but common ones are;

Have you had your hands anywhere near any radio wires or routing lately? (Common issue if you have just finished some other maint.)
Have you made any wiring changes?
Have you added any new equipment?

check the tray the radio slides in if you have one like that and clean the contacts,
check the antenna connections to see if the wire is pulling out of the connection,
clean (corrosion) and tighten all your ground wires (ground wires are considered hand tight but wrench loose until you put a wrench on them)
check the capacitor and make sure its connections are solid
Clean headset plugs

Loose and or corroded wires are a common cause.

Roger Lee
LSRM-A & Rotax Instructor & Rotax IRC
Tucson, AZ Ryan Airfield (KRYN)
520-349-7056 Cell

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Re: Noise/sound from generator

by Przemysław Wiśniewski » 10 years ago

Przemysław Wiśniewski

65 247 3

HI, radio is KRT-2 with simple db connector. Of course I checked connections, looks good. Month ago i putted passive david clark headsets - maybe this is a problem... I'll try to put another headsets.

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