Do you have access to like an oscilloscope or multimeter?
Three distinct connectors—Type-N (ANT 1), PL-259 (ANT 2), and Phono/RCA (ANT 3). ic-r8600 service manual
Here are three real-world faults that owners have solved using the service manual: Do you have access to like an oscilloscope or multimeter
The IC-R8600 service manual (typically part number: or similar variants for different production runs) includes: PL-259 (ANT 2)