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"Hal Rosser" wrote: Thanks, Barry on helping to wake up my recollections. I had forgotten that the increasingnes of the spacing of the conductors go into multiple wavelengths, which as you reminded us, is not practical for HF frequencies. But for 2-meters and above, it may be worth a try. The Bamboo suggestion sounds good, by the way. I used to use 300-ohm twinlead because of the light weight because I wanted the antenna up as high as possible, and more weight made it droop. "NoSPAM" wrote in message ... {Note: I tried posting this yesterday but Charter's NNTP server was having problems.} G-line, more correctly known as Goubau line, is not practical for use in the HF range. It is generally limited to UHF frequencies and above due to the physical size of the "launchers" which generate a surface wave along the line. For details, see: Geog Goubau, "Surface waves and their Application to Transmission Lines," Journal of Applied Physics, Volume 21, Nov. (1950). What I believe Hal is talking about was the early practice of using a single wire from the transmitter to connect to an essentially horizontal antenna. Of course that single wire did not behave as a transmission line, but rather became part of the antenna working against ground. In many cases this wire became the actual antenna with the horizontal portion acting as capacitive loading. The resulting antenna pattern is often quite distorted from that expected of the dipole. A good ground is needed on the transmitter, yet problems of RF in the shack are common. 73, Barry WA4VZQ find some of that oil they soak telephone poles in then coat it w/sealer ultimately wood prob wont last as long as some good plastic and i guess would be heaver stressing the wires more it will prob still hold more water than a smooth plastic dunno and prob not have as good insulative prop's but might be moot |
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