What the operator is controlling
Digital modes can hold average power far longer than casual SSB. Preserve the guide’s feed and strain relief, keep USB and power wiring away from the radiator and coax, and monitor the complete station for RF feedback.
Where people get into trouble
A transmitter power number alone does not define component stress. Mode duty cycle, mismatch, feed-line loss, tuner state, ambient temperature, and repeated transmissions all affect heating.
A repeatable field method
Begin at low power, verify SWR and audio/data integrity, increase only within every component’s continuous-duty limit, watch temperature, and log geometry and settings so the field station can be reproduced.
Follow the current guide for the exact CHA LEFS model, radiator, feed assembly, geometry, supports, and operating limits. A family name or mechanical fit does not establish electrical compatibility.
