Start with the decision: Troubleshoot from safety and exact configuration outward: stop transmitting, restore the guide recipe, inspect mechanics, prove feed line and connectors, measure at controlled points, test the return and choking, then change only one variable.
What changes the result
Useful diagnosis separates source, feed line, matching, radiator, RF return, support/environment, and propagation instead of changing them together.
The mistake to avoid
A tuner can hide a symptom; SWR alone cannot prove efficiency, pattern, feed-line current, safety, or range. Never continue transmitting into an uncertain or arcing system.
Use this practical sequence
Record the symptom and known-good baseline, remove RF, restore one exact configuration, inspect and measure from radio outward, substitute one known-good part at a time, and document the correction.
Source boundary
Current Chameleon guides and controlled Field Handbook diagnostic practices. Use the exact current product, complete configuration, and applicable safety limits.
