In plain language: Feed-line loss is RF power converted mostly to heat before it reaches the antenna—or before a received signal reaches the radio.
Why an operator notices it
The radio may show full output while the antenna receives less. Cable type, length, frequency, connector condition, moisture, and mismatch determine how much of the station is heating the line instead of reaching the air.
Decisions that matter
- Compare loss at the highest planned frequency and actual cable length.
- Include adapters, switches, arrestors, and connectors in the path.
- Remember that high SWR can increase effective line loss even when a tuner makes the radio happy.
A useful field check
- Measure or verify the cable before installation.
- Use the shortest practical route without creating unsafe bends.
- Compare power or loss from the same reference planes when diagnosing.
Common wrong turns
- Using a cable-size nickname as a loss specification.
- Ignoring frequency when comparing two lines.
- Treating station-end SWR as proof that the line is healthy.
Technical foundation
This lesson translates established transmission-line and antenna practice into a field decision. Use the current equipment datasheet and Chameleon product guide for changing loss, power, connector, installation, and compatibility limits.
