Hey Guys,
Just recently purchased an RV-4 a couple months ago and have absolutely been loving it.
I've been having some electrical issues that I've not been able to pin down. The one causing me the most stress has been my KY-197. ATC often reports me broken/unreadable when I transmit, giving me a QSA code of 5x2 (strong carrier, weak modulation). They pretty much describe it as mostly static when I transmit. However, I've not been having these issues when I'm close to the transmitter, like at an airport or flying formation.
So far, I've tried different headsets, tried turning all electrical equipment off (except battery and radio), tried different headset sockets, playing with ICS squelch settings, turning off ICS and going directly to radio, and cleaning the BNC connector on the antenna. My ICS works great and I can hear myself fine when I transmit on the radio. Receive function is also working great.
My two working theories are:
1) My ELT antenna (which is ~ 30 in. away and not in great shape) is soaking up some radiated power from the VHF antenna.
2) There is some modulation setting on the KY 197 not set up properly.
Anyone have any ideas? This problem really doesn't make sense to me. It seems I'm still transmitting a strong signal at range, but the carrier wave is not modulated properly... I've opened up the avionics bay before, but quickly closed it back up for fear of doing more harm than good.
Other random issues, which I'm not quite sure are related:
1) EchoUAT randomly disconnects in flight, then immediately reconnects.
2) Some reports of an intermittent transponder. Just recently had the transponder certified.
Thanks!
Mandy
Just recently purchased an RV-4 a couple months ago and have absolutely been loving it.
I've been having some electrical issues that I've not been able to pin down. The one causing me the most stress has been my KY-197. ATC often reports me broken/unreadable when I transmit, giving me a QSA code of 5x2 (strong carrier, weak modulation). They pretty much describe it as mostly static when I transmit. However, I've not been having these issues when I'm close to the transmitter, like at an airport or flying formation.
So far, I've tried different headsets, tried turning all electrical equipment off (except battery and radio), tried different headset sockets, playing with ICS squelch settings, turning off ICS and going directly to radio, and cleaning the BNC connector on the antenna. My ICS works great and I can hear myself fine when I transmit on the radio. Receive function is also working great.
My two working theories are:
1) My ELT antenna (which is ~ 30 in. away and not in great shape) is soaking up some radiated power from the VHF antenna.
2) There is some modulation setting on the KY 197 not set up properly.
Anyone have any ideas? This problem really doesn't make sense to me. It seems I'm still transmitting a strong signal at range, but the carrier wave is not modulated properly... I've opened up the avionics bay before, but quickly closed it back up for fear of doing more harm than good.
Other random issues, which I'm not quite sure are related:
1) EchoUAT randomly disconnects in flight, then immediately reconnects.
2) Some reports of an intermittent transponder. Just recently had the transponder certified.
Thanks!
Mandy