November 2019 Club Meeting - APRS

Friday, November 15, 2019

7:00pm MST

Ascension Lutheran Church 1220 West Magee Road, Tucson, AZ


Handy Man Corner

Presented By Tom, W8TK

TBD


All About APRS -- Automatic Packet Reporting System

Presented by

Marnee Dearman, KG7SIO

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APRS stands for Automatic Packet Reporting System. It is a digital-mode packet-radio protocol. Basically this means that you transmit encoded data and it sounds like scratchy modem-noises.

APRS is often thought of that system where you can transmit your GPS coordinates and you'll show up on a map. While this is true, and often how APRS is used, there are many, many more possibilities. So many that it gave me an idea for an APRS software application, which took me down the rabbit hole of everything APRS and amateur packet radio.

I will cover everything I learned along the way of developing my own APRS software application, and how anyone, even non-programmers, can get involved in the project.

 

Marnee, KG7SIO, is a member of the OVARC board of directors, and the website manager.

October 2019 Club Meeting - DMR

Friday, October 18, 2019

7:00pm MST

Ascension Lutheran Church 1220 West Magee Road, Tucson, AZ


Handy Man Corner

Presented By Tom, W8TK

A new home for The Pig


DMR - Digital Mobile Radio

Presented by

Bob Molczan, KA7VPR


Digital Mobile Radio (DMR) has been available for use by Radio Amateurs for several years, although out of reach for many due to the high cost of equipment only available from the commercial radio market.  Within the last 3 years an influx of affordable DMR radios for the Amateur market has made DMR available to everyone at costs remarkably less that current market analog/digital equipment from leading HAM radio manufacturers.

DMR is a very efficient Digital Voice mode with High Quality Audio and Superior RF Signal propagation characteristics.  DMR repeaters are linked world wide, and the availability of two DMR networks, Motorola and Brandmeister offer options to both the Experimenter and the Casual operator.  DMR Repeater and Hot Spot building is available and adds to the fun and effectiveness of DMR.

However, DMR has been given a "Bad Reputation" as being "Hard or Impossible" to program when it comes to developing a profile or "Code Plug" for one's radio.  For this reason many have either given up on or shied away from DMR to seek ease of operation from other digital voice modes.  This misconception of DMR's "lack of user friendliness" makes it difficult for Multi-Mode repeater groups like OVARC to justify keeping the DMR mode active on our area repeaters.

My presentation will attempt to dispel all of the misconceptions about programming DMR radios, and provide a clear explanation of how to write a "Code Plug". Details pertaining to DMR terminology and different "Customer Programming Software" (CPS) will be provided, along with samples of code plugs and much more.

I personally have been using DMR for over 5 years now, and own both commercial and amateur DMR radio gear from companies like Motorola, Vertex, CSI, and Anytone.  Although I do not claim to be an expert on DMR, I believe that I can remove many of the obstacles that keep you from making DMR your "Go To" mode for Digital Voice communications.  Please join me at the next OVARC General Session club meeting in October.

September 2019 Club Meeting - OVARC Repeaters

Friday, September 20, 2019

7:00pm MST

Ascension Lutheran Church 1220 West Magee Road, Tucson, AZ


Handy Man Corner

Presented By Tom, W8TK

TBD


OVARC Repeater System - Now and into the future

Presented by

Gary, KT7AZ

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The OVARC Repeater system has grown over the years and now expands to the far reaches of Metro-Tucson. It seems like yesterday, but it has already been 3 years since the Marana Repeater went on the air.

Enhancing our system to handle several new operating modes has been the more recent challenge. Having a repeater capable of handling D-Star, DMR, Fusion and Analog-FM and minimizing inter-mode conflicts, is a real challenge. At the same time we can’t forget about responsibilities to public safety.

Linking repeaters is another growing challenge. Which ones get linked? How easy is it to unlink? What happens to the links during an emergency, power failure or internet interruptions? These are all issues that confront us routinely.

During the September meeting we will cover the complexities of our repeater system; where it is now and where it will go. Please come and listen to where time and technology will push us into the future.

Gary – KT7AZ is our Repeater Committee Chairman that will lead this presentation. Gary is an Extra Class licensee and has been licensed since 1984. He is a recently retired Detective as well as the IT Manager from The Oro Valley Police Department. With a 350 foot loop, an off center-fed dipole and a Mosley Yagi, Gary operates nearly all bands on CW and SSB but is particularly interested in the digital modes – PSK, FT8 etc.

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