What is component 3 in figure T-3?

Explanation
Component 3 is the variable inductor in the Figure T-3 antenna coupler. A connector, meter, and variable capacitor are different parts and do not match the numbered inductor symbol.

Component 3 is the variable inductor in the Figure T-3 antenna coupler. A connector, meter, and variable capacitor are different parts and do not match the numbered inductor symbol.