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Articles about jammers, and how to deal with them:
Catching the Blue Knob PA. Repeater Jammer of 2004-2005 How Kevin - W3KKC and Scott - N3XCC caught the jammer of the Blue Knob 147.15 MHz machine.
Repeater Jammers or, "God Luv Em", Nobody Else Does! By Pete Policani K7PP
Offsite link to the "Homing In" web page of Joe Moell KØOV This web site started with Joe's column from 73 magazine.
While not really intentional jamming, repeaters can be bothered by other repeaters that pop up on their frequencies upside-down, meaning the output of one repeater is on the same frequency as the input of another. Repeater coordination usually takes care of this situation, but if no frequencies are available, sometimes repeaters are just put up anyway. If there's a CW ID that can be heard, that makes it quite easy to zero in on, but a digital (DMR) repeater is much tougher to locate. Here's how a couple of repeater trustees dealt with an uncoordinated DMR repeater that showed up on their input:
The DMR Interference Case By Robert W. Meister WA1MIK
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