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Quad Band Antenna?
On 12/30/2013 8:59 PM, Fred McKenzie wrote:
In article , Tom Horne wrote: We would like to be able to use 50, 144, 220, and 440 MHz radios at any position and we would prefer not to have to resort to diplex ers and separate antennas on the roof if it can be avoided. Tom- Phil and CRN have good suggestions that directly address your needs. Another approach for common local frequencies, is to have a single base station for each frequency, with a remote control at each position. This allows the base station to be located (in a separate equipment room?) closer to the antenna to minimize feed line loss. All it takes is telephone wires to connect between the base stations and remotes. Each remote could have a switch to select base stations. Fred K4DII Fred, This isn't a good idea for several reasons (as have been explained to Tom by others and myself several times via email). The main one being lack of backup. When you have a radio remoted like this, if the radio or control head (or even the connecting cable) fails, you are in trouble. Often times the equipment room is not readily available, especially if there are other radios nearby. And even if the radio is available, you can generally only replace it with the same make (and often model) of radio. That would be great if everyone used the same radio. But they don't. And in an emergency, the number one consideration is reliability. And since these radios aren't used or tested regularly, chances of a failure going unnoticed are higher than your home or mobile station. When the radio is at the operating position operating off of 12VDC, you can replace it with generally any mobile radio. And if the power supply fails, you can replace it with almost any other power supply (as long as current demands can be met in both cases, obviously). In an EOC or similar situation, there are "necessities", "recommendations" and "nice to haves". Reliability is at the top of "necessities". IMHO, "being able to operate any radio from any position" is at the bottom of "nice to have". Sure, it would be nice - but would it actually be used? And what are you giving up to get it? -- ================== Remove the "x" from my email address Jerry, AI0K ================== |
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