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RFinder's main service is the World Wide Repeater Directory (WWRD), which is a directory of amateur radio repeaters. RFinder is the official repeater directory of several amateur radio associations. RFinder has listings for several amateur radio modes , including FM , D-STAR , DMR , and ATV .
A preserved Philadelphia and Western multiple-unit passenger car at Penn's Landing in Philadelphia in 1990. The Philadelphia and Western Railroad was a high-speed, third rail-equipped, commuter-hauling interurban electric railroad operating in the western suburbs of Philadelphia, Pennsylvania.
APRS data can be displayed on a map, which can show stations, objects, tracks of moving objects, weather stations, search and rescue data, and direction finding data. APRS data is typically transmitted on a single shared frequency (depending on country) to be repeated locally by area relay stations (digipeaters) for widespread local consumption.
The NTS as it exists today was first outlined by George Hart, W1NJM (died 24 March 2013) in "New National Traffic Plan: ARRL Maps New Traffic Organization for All Amateurs" as part of the September 1949 issue of QST. While traffic passing between amateur radio operators was nothing new, Hart's system extended coverage of traffic capability in a ...
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Some repeaters have automatic call sign transmission at regular intervals and use the secondary suffix /R at the call sign's end. Some jurisdictions discourage this practice on the grounds that it could be confused with an amateur from the repeater's location working portable in Russia.
Call sign Frequency City of license [1] [2] Licensee Format [3]; KDKA: 1020 AM: Pittsburgh: Audacy License, LLC: News/Talk: KDKA-FM: 93.7 FM: Pittsburgh: Audacy License, LLC