I need some troubleshooting advice/education. I’ve owned my RV-4 for 15 years and the radios have always been good. A few months back I noticed was intermittently scratchy and faded (one transmission would be clear, the next faded and quiet) yet, according to others, I was transmitting loud and clear. Problem existed on both my primary KX125 and backup KX175B. Because the problem existed on separate radios with separate antennas I suspected the intercom—an old 2-place GCA 400—as the common failure point…and also started having some intermittent ICS comms with passengers. Cleaned all contacts, only marginal improvement.
Last weekend, I noticed that if I turned up the volume pretty high on the radios—almost max—both radios were loud and clear. I just turned down the volume on my headset and was good to go.
Ignorant question: The radio issues existed in both ICS and Isolate modes. If the radios independently seemed to work fine at high volume, how would the ICS affect that (i.e. be to blame)? In other words, is the problem likely to be from the ICS or something else? Any recommendations on how to better troubleshoot? I feel like I've tried multiple variables but haven't come any closer to determining the root cause.
Last weekend, I noticed that if I turned up the volume pretty high on the radios—almost max—both radios were loud and clear. I just turned down the volume on my headset and was good to go.
Ignorant question: The radio issues existed in both ICS and Isolate modes. If the radios independently seemed to work fine at high volume, how would the ICS affect that (i.e. be to blame)? In other words, is the problem likely to be from the ICS or something else? Any recommendations on how to better troubleshoot? I feel like I've tried multiple variables but haven't come any closer to determining the root cause.