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#1
October 10th 08, 06:39 PM
posted to rec.radio.amateur.antenna
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Dummy Load Antenna
"JB" wrote in message ... "J. B. Wood" wrote in message ... That is very similar to what the Maxcom Antenna Matcher did. It was reviewed (and panned) in November 1984 QST. As you suspected, almost all the power would go into the dummy load and very little would be radiated. Honestly, it's not a very good idea. :-) 73, Bob K3PH Hello, and generally not if maximizing operating efficiency (the portion of available transmitter power that is being radiated by the antenna) is of concern. However, placing a low-loss pad between the output of one device and the input of another can be a simple, inexpensive broadband matching technique if the power loss in the pad can be tolerated . Sincerely, and 73s from N4GGO, John Wood (Code 5550) e-mail: Naval Research Laboratory 4555 Overlook Avenue, SW Washington, DC 20375-5337 I was wondering when we would hear from someone like you. --------- When using the radio with the padded antenna in a city environment and when utilizing nearby repeaters, it is quite acceptable to design equipment this way. It also reduces the sensitivity of the radio to unfortunate antenna shorts against automobile interiors or body parts. If you have enough power left over to be DFQ into the repeaters with the power available, I see it as a viable compromise that can be most beneficial. Hams tend to think in terms of operating simplex out into the far reaches of the aether, but there are many situations where padding is a useful feature. Ed, NM2K |
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