What type of coaxial cable should be used for antenna installations ?
A good quality RG-58 type is sufficient for most applications and antennas. Higher frequency systems (DME, Transponder, UHF Radiotelephone) may require a more “stout” cable, such as RG-142 or RG-400. The FAA may require the use of flame retardant cables for certain installations such as ELT. Check with the appropriate FAA office.