Important Announcements

Important Announcements

Important Announcements


In the coverage plot for the 145.450 (Megler) Repeater below, contributed by Frank Wolfe [NM7R], the parameters are selected conservatively to represent the "worst case" for normal operations. Having the plots a bit pessimistic is better for planning than a wildly optimistic picture that gives false hope for coverage that really doesn't exist, encouraging those weak in-the-mud signals we all hate to deal with.

The the outer area on the plots represents a "plain vanilla" (3 dBi) mobile vertical at 1.5 meters above the ground, with 40-watts. This is a good representation of a "typical" mobile. A base station would probably do much better, but it is hard to characterize a "typical" base station.

The inner (darker) area represents a "typical" HT, with a -2 dBi antenna, also 1.5 meter above ground and 4-watts.



Megler_45











P1010020
W7BU’s main repeater is the ’45, operating on a frequency of 145.450 MHz, with an offset of -.600 MHz, and a PL tone of 118.8. It is located on Megler Mountain, approximately 1,00 feet above the Columbia River, almost directly across from Astoria, Oregon. Here Frank Wolfe [NM7R] (in red jacket) and others inspect the repeater shack at the ’45.


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Here are a couple of pictures of Jay [W7FBM] installing the antenna for the 145.45 repeater on the KMUN broadcast tower on the north side of the Columbia River.
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A late spring ice storm caused damage to the 145.450 repeater in 2009, knocking the antenna out of its brackets and bending it into an L shape. Here are some pictures of the damage
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and the repair work, being done by Jay Shepherd [W7FBM] and Frank Wolfe [NM7R]. Click to enlarge any of them. Jay [W7FBM] assembled the new antenna and Frank [NM7R] installed it on tower on March 2nd. At that time, Jay had still not received the repaired controller board back from ARCOM - it will be reinstalled later. They wisely chose to go ahead and do the tower work on a nice day... the following day the weather turned bad again, and the controller board replacement can be done in inclement weather, as it is inside the nice, dry radio shack. Here are three pictures of the March 2 trip. Picturre # 1 is tower and all lthe antennas that are on it. Picture #2 is Frank [NM7R] removing old damaged antenna while snorting coax, and Picture #3 is new antenna.  Hard to pick out but looks very small, just above little dish antenna, 4 element yagi.

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Important Announcements

Important Announcements
Important Announcements