Using AC6LA's Line Loss calculator, and making the following assumptions: Line impedance: 420 ohms, (1/4" copper pipe spaced 4 inches apart) SWR at antenna: 14.0 (Z = 30 ohms) Line attenuation: 0.0266 dB/100 feet (Duffy, "RF Two Wire Transmission Line Loss Calculator", owenduffy.net/calc/tl/twllc.htm) Length of line: 500 feet (conservative estimate that probably represents a worst-case?) Frequency: 10 MHz ___________________________
Total Line Loss = 0.891 dB >>>I've seen pictures of those SW transmitting plants and always assumed that >>>they >>>must have been very efficient. Upon reflection---no pun intended---now I'm >>>not >>>so sure. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
