Feedline Loss Calculator

Compare coax loss at your frequency and run length, and see which cable actually gets the most power to your antenna.

Target Freq

Cable Length (ft)

Your Cable Connector Type # of Connectors Transmit Power (W)

Cable	Loss (dB)	Power delivered

Loss figures are matched-line (1:1 SWR) attenuation from published cable specs, interpolated between standard reference frequencies. Real-world loss will be higher if your antenna system isn't well matched.

Connector Comparison

Connector	Loss (dB)	Power delivered

Connector loss depends heavily on build quality and installation care — figures above are typical/representative, not a guaranteed spec. N, BNC, and TNC stay low-loss well into the UHF range; PL-259/UHF connectors are impedance-mismatched and lose noticeably more as frequency climbs past VHF.