Checking Antenna Lead-In Cables
In case of continued reception or noise complaints, always check the lead-in antenna cable with a digital multimeter (refer to the following illustration and chart). If long jumper leads are not available, check center conductor continuity by jumping the antenna coax cable to ground and checking for continuity from the center conductor at radio to ground. The type of coaxial cable used is RG-62/U.
When checking resistance, cautiously wiggle the antenna lead-in tip and antenna coax cable. Consistent readings from table should always be obtained. If not, some portion of the antenna lead-in is intermittent and antenna lead-in should be replaced. Also try:
- Running a braided ground strap to the antenna lead-in.
- Changing the antenna lead-in.
- Disconnecting the antenna lead-in to check resistance.
- Check antenna in-line connection for corrosion or poor connection.