Why it matters in the field
Small transmitting loops can develop very high RF voltage and intense near fields. Nearby metal, ground, hands, and even support hardware can detune them.
Where operators get caught
Tuning while standing beside the capacitor may move resonance again when the operator steps away; remote or low-power adjustment is safer and more repeatable.
A better field procedure
Secure the loop, establish the exclusion distance, tune at minimum power, verify SWR after clearing the area, and never touch it while transmitting.
Connector fit proves only mechanical engagement. Current product instructions, cable preparation, electrical role, weather sealing, structural load, grounding code, and the complete antenna configuration still control.