From the Archives 2021...

You are Here: From the Archives 2021
Friday April 16th, 2021 -  7 PM, via Zoom

Digital Modes and Multiprotocol Linking on VHF/UHF:
Where Have We Come From and What is Next?
by Bud Talbot, PhD
The use of digital voice modes on VHF and UHF in amateur radio has grown in popularity over the past five years. Amateur operators have made great use of "made for amateur" modes such as D-STAR and Yaesu's implementation of C4FM, in addition to commercial modes such as DMR, NXDN, and P25. One of the more exciting recent developments in this area is multiprotocol linking, which brings different modes together. In this talk, he looked back at the past few years of digital voice use on VHF and UHF in amateur radio to lay the groundwork for the current state of use. He also discussed some more recent developments, such as new digital modes and phone and computer apps for accessing digital voice networks. Finally, he offered some ideas on where the field might be going and what challenges and opportunities lie ahead.
Brief bio: 
Dr. Robert (Bud) Talbot is an Associate Professor of Science Education at the University of Colorado Denver. He is an experienced secondary school physics teacher, and has been an amateur radio operator since 1998. His current interests in amateur radio focus on VHF/UHF digital voice modes and multiprotocol linking, hotspot building and troubleshooting, and network development. He is the co-founder (along with Jimi Chistensen N7VDR) of the Colorado HD Talkgroup - DMR BrandMeister 31088 - and the Colorado Digital system Dr. Talbot also works in emergency communications for the Boulder County (Colorado) Type 3 Incident Management Team, and is a National Wildfire Coordinating Group certified Radio Operator and Communications Technician in training.
Friday March 19th, 2021 -  7 PM, via Zoom
Working DX via Sporadic E.
Did you know you can work stations thousands of miles away on the VHF bands? Hayden VK7HH from Ham Radio DX in Australia ran us through a presentation of his experience on working long distance via Sporadic E.
Covered in this topic were:
  • What it it?
  • When does it occur
  • DX on what bands?
  • Predicting openings using WSPR
Hayden lives in Australia and has had an interest in electronics since an early age and has been a licenced amateur radio operator for 17 years with main interests in digital modes such as WSPR or FT8 using WSJT-X, VHF and above propagation and microwave experimentation. He also maintains and runs several ham radio repeater stations and a YouTube channel - Ham Radio DX in his spare time. Please check it out!
Kind regards,
Hayden VK7HH

Friday February 19th, 2021 -  7 PM, via Zoom:

Batteries for Ham radio and Solar applications
Our feature presentation for this month's meeting came to us from Kevin Zanjani - KI6DHQ who made a presentation on batteries for Ham radio and Solar applications. Kevin is the National Sales Manager for Bioenno Power in California. This exciting presentation discussed typical applications and he had a virtual show-and-tell of various products from Bioenno.
Kevin has earned his Master’s Degree in Electrical and Computer Engineering from UC-Irvine and his Bachelor’s Degree from the University of Michigan. Kevin then went on to get his MBA at USC. Kevin has been with Bioenno Power for 12 years.
​January 15, 2021, 7PM -
Annual Membership Meeting/Elections via Zoom

07:00 PM Arizona time.


January Presentation: FCC Monitoring Program


About our Presenter:

Riley Hollingsworth, K4ZDH, was our guest speaker.

Two years ago, Riley agreed to head up the ARRL’s joint initiative with the FCC called the Volunteer Monitoring Program. You might recall the Official Observer Program of the ARRL; the new program has much more involvement from the FCC. Riley will give us all the details during his presentation.


During his career at the FCC Enforcement Bureau, we invited Riley to be our presenter at a previous OVARC meeting; some OVARC members might recall his excellent presentation then.


Riley has been licensed for 60 years, receiving his first call sign, KN4ZDH in 1961 in South Carolina. After 10 years with the FCC’s Enforcement Program, Riley retired in 2008. He became the Atlantic Division Vice Director but gave up that slot in March of 2019 to run the Volunteer Monitoring Program. As of March, 2020 the program is up and running and has 160 Volunteer Monitors.


Other 2021 OVARC Membership Meetings...
Due to concern for the health of our members/guests, and in compliance with CDC, State, and Local Government directives, REGULAR OVARC Membership meetings will not resume until an "all clear" is announced by these agencies. Until then, we hope to schedule more "Zoom" meetings. Check back here often for updates! Thank you for your cooperation.


How to: Horizontal Loop Antennas by
John Payton (N7GHZ)

OVARC Member John Payton (N7GHZ) has created a PDF presentation on Horizontal Loop Antenna Design, as well as additional info and videos.

To download John's PDF, click HERE.

To access the other material including videos, click HERE.


To report problems with the web site such as broken or outdated links, or missing information, please contact the WebMaster: