Post TU Comms and Networking

[CharlesHarris]

Even allowing for line losses, which are considerable for cable runs over about 50 metres at UHF frequencies, a 13dB antenna provides about a ten-fold increase in effective radiated rf output, compared to an isotropic source. The Wilson repeater has about 5w output into the feedline, and is connected to the antenna with Times Microwave LMR400 cable, which is the same used by the cellular companies for short runs from their NEMA cabinets housing rooftop equipment on high rise office bulidings. This is lower loss typical cable used for ham radio, but easier to deal with than the large air dielectric cables, such as Andrews Heliax which is used for long tower runs of 100 metres or more.