The TNC connector series is a miniature, threaded weatherproof series with a constant 50 Ω impedance. And a frequency range of DC to 11 GHz. The TNC series shares its contact design with the BNC series, utilizing a threaded coupling nut for secure mating and higher frequency performance than the BNC.
TNC connectors are available in both standard polarity and reverse polarity production. Reverse polarity is a keying system accomplished with a reverse interface and ensures that reverse polarity interface connectors do not mate with standard interface connectors. Amphenol accomplishes this by inserting female contacts into plugs and male contacts into jacks to ensure quality.
Invented in the late 1950s and named after Paul Neill of Bell Labs and Carl Concelman of Amphenol. And the TNC connector has been employed in a wide range of radio and wired applications.