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![]() "fogus" wrote in message oups.com... Hello all, I am just starting to get myself into Ham Radio. I am finding studying Morse very hard, but I really want the general license, so I'm sticking to it. My questions to you guys today regard antennas. I would like to have some antennas mounted on my house roof. I live in North Vancouver, BC, Canada, if that helps any in giving suggestions. I am curious about what antenna is used for which frequency. I would like to be able to transmit on the HF and VHF bands. Apparently there is something about a 10-meter band, a 15-meter band, etc. Why are they called meter bands? Is that like an electric "meter" or something, or is that like the "metre" unit of distance measurement? If it is the metre of distance, do the numbers represent how high the antenna has to be, or how long, or what? There is no way I can have a 60 metre antenna on my roof! Perhaps they could be coiled up or something? Can one antenna transmit on a broad range of frequencies? How much should I expect to pay? Second question, with hand held 2-way radios, in North Vancouver, the range is limited because of the hilliness. I literally live on a mountain, and there are forests and valleys everywhere. My house is on a bit of a hill, and standing on my balcony I can receive and transmit very well over a good range (2-3 miles). On ground level in the same home I can get 1 mile at most. In the basement I can get 0.5 miles. What I want to do is to stick my antenna (from the BPR-40, Mag One by Motorola) up high on my house, and then transfer the signal, via wire, down to my room or even the basement. The threading seems pretty standard on the radio, but is doing this possible? Would it screw up the "meter" of the antenna? How could I transfer the signal without messing up the "meter"? I would like to transfer the signal a minimum of 50 feet. Thanks, fogus METERS The term "wavelength" is left over from the early days of radio. Back then, frequencies were measured in terms of the distance between the peaks of two consecutive cycles of a radio wave instead of the number of cycles per second. Even though radio waves are invisible, there is a measurable distance between the cycles of electromagnetic fields making up a radio wave. The distance between the peaks of two consecutive cycles is measured in meters. The relationship between a radio signal's frequency and its wavelength in meters can be found by the following formula: wavelength = 300 / frequency in MHz Certain segments of the shortwave bands are referred to in terms of "meter bands" as a convenient form of shorthand. For example, the term "10-meter band" is used to refer to the ham radio band that extends from 28000 to 29700 kHz. Muliband antennas are common. For example, the Cushcraft R8 overs 6,10,12,15,17,20,30,40 meters The GAP Titan DX antenna covers 10m 12m 15m 17m 20m 30m 40m and 100 KHz on 80m Using a tuner and a long wire -- just about all the bands can be covered. SGC makes a tuner that will cover 1.0 to 60 MHz with antenna lengths of Minimum lengths: 8 feet(3.3 to 60 MHz) 23 feet(1.0 to 60 MHz) For your VHF antenna use low loss coax (50 Ohm) rated low loss at the frequency you are operating at. P.S. A long transmission line "does not mess up the meter" as you wrote. I have run 100 feet of coax in an installation without a problem Hope this helps Good Luck Lamont |
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