Over the past few months there has been a renewed interest in AllStarLink FM simplex nodes among our members. These low power devices allow users to connect to remote VoIP nodes and repeater systems using an internet connection and an HT. Most opt to buy or build a device on 70cm. A couple years ago, during the initial DMR hotspot craze, SBARC expert consultant Matt W6XC identified a few frequencies around 431 MHz that were useful for digital hotspots like the OpenSpot and ZumSpot. HOWEVER, these frequencies are NOT appropriate for analog FM nodes. We must use a different part of the 70cm band for FM emissions. Matt suggests the following options for low-power, analog FM usage: 440.000/445.000; 446.860/441.860; 446.880/441.880 may be used as pairs for a low-power duplex node or as separate simplex node frequencies. Please listen to these frequencies with low squelch settings and no CTCSS for a few days before permanently parking your node here to see if and how these frequencies are used. FM simplex nodes are best PL/CTCSS protected, especially if they are left connected to a system like K6TZ or WIN System. Definitely avoid 446.000 altogether. This is the National Calling Frequency for 70cm. 446.500 and 446.520 are “General Simplex” frequencies. Others many want to use these for simplex QSOs or other itinerant purposes so please don’t park your node on any of these three frequencies. Also note that 432.000-439.999 MHz is allocated to weak signal, Amateur Television and digital emissions only. 440 is tough given the lack of simplex allocations. It’s a truly stuffed band! Perhaps just as important as which frequency you choose for your node is setting the PL/CTCSS tones. In Santa Barbara and Ventura counties, DO NOT use 131.8 or 88.5 127.9 or 131.8 Hz as a tone for your node. Picking almost anything else will ensure that you don’t inadvertently open the receiver of a repeater on the same or nearby frequency. If you are interested in these FM VoIP nodes, consider the ClearNode and SHARI projects. Levi, K6LCM K6TZ Trustee
Upcoming EventsMay19Thu7:30 pm Swap NetSwap NetMay 19 @ 7:30 pm – 8:00 pmK6TZ Repeater – 146.79 (-) PL 131.8, linked to 224.08 (-) PL 131.8 – Hams can list something they have for sale, or something they are looking for. Items are limited to anything related to amateur radio. Hosted by Mike W0JFB.8:00 pm Technical Mentoring and Elmering...Technical Mentoring and Elmering...May 19 @ 8:00 pm – 9:00 pmK6TZ Repeater – 146.79 (-) PL 131.8, linked to 224.08 (-) PL 131.8 – Discussion of the technical aspects of amateur radio. Special attention is given to newcomers. Hosted by a weekly rotating crew of net controls.May20Fri7:30 pm Club Meeting @ Goleta Union School DistrictClub Meeting @ Goleta Union School DistrictMay 20 @ 7:30 pm – 9:00 pm15:51:17The Santa Barbara Amateur Radio Club holds its General Meetings on the third Friday of the month. Your Board of Directors recently made the decision to have Club Meetings 12 months of the year, instead of skipping the months of June, July, August, and December. The meetings are held at the Goleta Union School Dist. Admin. Center Board Room. The meeting starts at 7:30pm, but come early for the “Free-to-Good-Home” Table, SBARC Bookstore, and socializing.May21SatMay23MonMay24Tue8:00 pm Digital Communications NetDigital Communications NetMay 24 @ 8:00 pm – 9:30 pmK6TZ Repeater – 146.79 (-) PL 131.8, linked to 224.08 (-) PL 131.8 – Open net where we discuss and operate amateur television, various digital modes, using computers with radios, software installation and configuration, and anything related to using your computer with amateur radio. Hosted by Brian – K6BPM.
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