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In article .com,
"RHF" wrote: FO&A - But their is another work around 'trick' answer - out there ! So I want to Rig my cut-to-order Dipole Antenna to use for general across-the-bands Shortwave Listening. First - Don't Think of It as a Dipole . . . I prefer antennas for reception closer to the space impedance around it. A ball park antenna type is a folded dipole. It can be made cheaply with 300 ohm twin lead transmission line and 4:1 BALUNs to connect it to 50 ohm coax is also cheap and common. Another advantage is it is grounded so static charge pickup is shunted. There is a trick to make it perform better on bands other than what it is cut for using shorts at a specific distance from the ends depending on the band for which it is cut. You can use the dipole concept by using several cut for different bands tied together at the antenna output. For this to work well the paralleled elements need to have a relationship to each other that prevents the energy picked up from one element flowing into another element. -- Telamon Ventura, California |
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