Looking for some Comms 101 troubleshooting assistance.
I have an RV-12 with a Garmin SL-40 and standard com antenna installed as per the plans except for using nutplates to secure the antenna rather than the supplied 8-32 hex nuts and split washers.
I can receive OK but get a loud tone/feedback noise in the headset when I push the PTT button to transmit, and am variously reported as `garbled/readability 2/unintelligible' etc. It's been a problem since day one, and I need to get to the bottom of it.
The problem occurs the instant I press the PTT button, whether I speak or not. The intercom works fine, and I've swapped headsets, tried different headsets, etc. I've also tried transmitting from the right seat, but the problem occurs on that side too. I'm thinking maybe a faulty antenna cable or connectors, grounding problem or antenna issue, but not having any expertise in this area, don't really know what the problem might be or how to troubleshoot it, other than finding someone who knows about these things which is easier said than done. Any ideas?
I have an RV-12 with a Garmin SL-40 and standard com antenna installed as per the plans except for using nutplates to secure the antenna rather than the supplied 8-32 hex nuts and split washers.
I can receive OK but get a loud tone/feedback noise in the headset when I push the PTT button to transmit, and am variously reported as `garbled/readability 2/unintelligible' etc. It's been a problem since day one, and I need to get to the bottom of it.
The problem occurs the instant I press the PTT button, whether I speak or not. The intercom works fine, and I've swapped headsets, tried different headsets, etc. I've also tried transmitting from the right seat, but the problem occurs on that side too. I'm thinking maybe a faulty antenna cable or connectors, grounding problem or antenna issue, but not having any expertise in this area, don't really know what the problem might be or how to troubleshoot it, other than finding someone who knows about these things which is easier said than done. Any ideas?