Direct answer: Ground, height, radial routing, nearby conductors, moisture, feed-line placement, and the support environment change the installed impedance. A guide value is a starting point, not a universal memory.
What to verify
Identify the exact complete configuration and current source. Confirm the component role, position, interface, power, return path, support, tuner state, and installed geometry before assembly.
The boundary that prevents mistakes
A shared thread, connector, diameter, or product-family label does not prove electrical or structural compatibility. Do not replace a documented component or omit a required group without a current Chameleon source.
Use this field sequence
Open the current guide, select a named recipe, inventory it, assemble in order, verify mechanics and RF at low power, record the final setup, and recover it safely.
Source boundary
MPAS READY Product Guide 250725, current product/support guides, and controlled System Builder records.
