Speakers at our
Club Meetings

 Our general membership meetings are currently be held in a hybrid manner; both in person and on Zoom. A link for the Zoom session will be sent out to all those belonging to our Club's MDARC@Groups.io forum a few days before the meeting.

August 20, 2021:
SDR for Dummies
by Ed Morales, KJ6KYT

Coming Up:
September 17, 2021:    Underwater Wireless Transmission of Data and Energy
                                          by Lucas Katz

Past Presentations:

To review our previous speakers not on this page, see the following pages:
*    Speakers-2015 & 2016 

*    Speakers-2017 & 2018
*    Speakers-2019 & 2020

July 16, 2021:
Rob Rowlands, NZ6J
The miraculous nanoVNA
by Rob Rowlands, NZ6J

Rob Rowlands, NZ6J
Rob Rowlands is a semi retired electrical engineer from New Zealand, but is involved in teaching RF and selling part time. The first part of his career was with New Zealand Telecom, and since 1989 with Hewlett-Packard /Agilent /Keysight test equipment in the SF Bay Area. Rob has a degree in electrical engineering from the University of Canterbury in Christchurch NZ and is a life member of the IEEE.

Rob has been licensed since 1963, when is first call was ZL3TAR; and is interested in Mountain top operating, APRS and public service events.
Here's a link to the recording of Rob's presentation. Note that the Club business meeting takes up the first several minutes of the recording. Rob's presentation begins at about the 0:15:40 point.

Jim Moen, K6JM
June 18, 2021:
DMR and D-Star
by Jim Moen, K6JM

The Club is making changes to the W6CX D-STAR repeater.  My presentation at tonight’s meeting will cover a bit about digital stuff, what’s called Multi-Mode and what the upcoming changes are all about.

Jim Moen, K6JM
I got my Novice license in 1959, and got on the air with a Collins 75A-2 receiver and WRL Globe Chief Deluxe CW transmitter. I upgraded to General in 1960 and added a screen modulator and VFO for AM phone. I then traded for a Collins 75A-4 and got a Central Electronics 100V for SSB, using a Mosley TA-33 Jr beam and a folded dipole. I was active through the 1960s (using the club station at Brown University), but my career in computers took over and I unfortunately let my license expire.

In mid 2003, I re-tested and got back on the air using my original call K0ZXU as a vanity call. I upgraded in 2006 and got vanity call K6XZ. Finally in 2009, I was able to get this call.

I have done little HF over the last decade, focusing instead of digital voice modes -- DStar is my favorite, but I have 3 multi-mode hotspots and DMR and Fusion radios to go with them.  My primary HF station now is an ICOM 7100, but I still like my Kenwood TS-2000, sometimes with an Ameritron ALS-600 amp. I recently put up a new HF sloper antenna, and hope to get active there again.

I did QRP for a while, and am thinking I should get back into it with my FT-817ND and the NUE-PSK Digital Mode. I have taken them to the field using a Pacific Antennas PAC-12 ground mounted vertical.

Below are links to Jim's slides and to a recording of his presentation. Note that I could not run the recording directly from this link. Apparently, my browser doesn't have the required driver. However, I was able to download the file from this link and play it on my PC.

Jim's Slides                                                Jim's Presentation Recording

May 21, 2021
Walnut Creek CERT Winlink Test System
by John Trinterud, K9ONR
John Trinterud, K9ONR

A VHF Winlink System - from design through equipment selection, installation and system test.

In Walnut Creek, our 300+ Community Emergency Response Teams (CERT) team members receive basic training to safely respond to the needs of their neighborhoods following disaster, and to serve as the eyes and ears of the City’s Emergency Operations Center and first responders. Additionally, our CERTs have helped police search for missing minors, run welfare checks during planned power shutdowns, and distribute materials for safety alerts.

Ham radio communications and our 100+ licensed CERT hams play a critical role interconnecting Walnut Creek CERT forces both within their areas and to the CERT Emergency Radio Operator (CERO) radio room serving the Emergency Operations Center in City Hall.

Tonight’s presentation covers a technology and process upgrade on the critical link between our CERT command posts and the EOC, changing from an ineffective paper and people-intensive manual process to electronic messaging using amateur radio. We’ll briefly explain the current manual situation and the many alternatives we evaluated before choosing a somewhat atypical configuration of Winlink Express, VARA FM Wide, RMS Relay and RMS Packet over simplex VHF.

John Trinterud (JT) K9ONR, Project Lead
Background of 55+ years in communications, telephony, computer operations, UNIX software support, organic farming and organic inspections (!). My wife Colene is the Red Cross External Affairs rep for Pleasant Hill. Finally retired in 2020 after graduating several times.

First licensed in 2012 as KJ6PAP, now General Class, graduated from CERT after 10 years.

Mike Patterson, N6JGA, Lead documentarian/disciplinarian
Retired telecom engineer for Chevron, then MDARC, Pacificon, NARCCC, CERT Repeater Trustee, VE, etc. Widely known throughout the radio community.

First licensed in 1994, now Extra Class, Walnut Creek CERO Operator.

Jim “Sharky” Turnbull, WW1ACE, Lead tester 
Teacher of special needs children, VE, volunteer traffic cop for the Vaccine Distribution Center in Concord, Ham Cram/GOTA instructor for Walnut Creek CERT, Winlink Express onboarding for the CERT hams working with us on the test system, just about anything else that needs to be done…

First licensed in 2015 as KK6IDN, now Extra Class, Walnut Creek CERO Lead.

April 16, 2021:
Annual Auction!!
     Our Auction will be virtual this year, held on Zoom.
     See our Auction page for details.

March 19, 2021:       
K1N DXpedition To Navassa:  The Caribbean’s Secret Island
John Miller, K6MM
by John Miller, K6MM

Discovered by Christopher Columbus in 1504, this was a rare opportunity to visit an important but remote Wildlife Refuge in the Caribbean.  For 80 years the still-standing lighthouse served as a beacon for ships traveling through the Windward passage from the Panama Canal.  Only accessible via helicopter, uninhabited Navassa screams “Stay Away”.  Those attending the presentation will soon discover “why”.

John Miller, K6MM
John was first licensed as WV2BQJ in 1958 while living in Syracuse, NY. In 1976, John'.s career took him to Silicon Valley, where he reconnected with amateur radio in the late 90s. Since then John has focused heavily on DXing, contesting, and recruiting new operators into the hobby. A DXCC Honor Roll member, John holds 8-Band DXCC, and is working on completing 160M for the 9th band.  His article entitled "The No Excuses 160M Vertical" won the cover plaque award for the June 2009 issue of QST.

John was a DXpedition operator at PJ7E Sint Maarten, K9W Wake Atoll, K1N Navassa Island, K5P Palmyra Atoll, and KH1/KH7Z KH1 Baker Island.  He was also a pilot and/or webmaster for NH8S (Swains Island), C82DX (Mozambique), FT4TA (Tromelin), 3G0ZC (Juan Fernandez), and VK0EK (Heard Island).

John is the current President of the Northern California DX Foundation, a Past-President of the Northern California Contest Club, a former Director of the Northern California DX Club, and a founding member of the CW Operators . Club.  He is also a member of the editorial staff of the National Contest Journal, and Co-Chairman of the International DX Convention for 2011, 2013, 2015, 2017, 2019 and 2021.

In addition to his four grandchildren, John's interests include website design, piano composition, and exploring the back roads of the Bay Area on his Harley Davidson motorcycle.

February 19, 2021:
Mathison Ott
Mesh Networks Revisited
by Mathison Ott, KJ6DZB

The amateur mesh data networking in 2021.

Mathison Ott, KJ6DZB
20 years of experience in commercial entertainment and theatrical production.   
Journeyman in International Alliance of Theatrical Stage Employees Local 107.
CTS Certified Technology Specialist.
First Licenced in 2009 KJ6DZB  
Employed as a Senior Scene Technician for Audio and Video System a Cal Performances.

Note: A PDF of Mathison's slide deck is available here.

January 15, 2021:
Donating a Vehicle to Cars2ndChance.com
Rich Lueck, K6REL

Raise money for MDARC and get a tax deduction.

Preparing for Emergencies
by Trish Beirne
     Emergency & Volunteer Programs Manager
     City of Concord

Trish Beirne
Trish earned a degree in Public Administration from University College Dublin in Ireland, then spent several years in Irish government service and private corporations in Europe. During this time, she completed her MBA in Strategic Management with Oxford Brookes University. She moved to the U.S. in 1994, where she continued her career before taking a break to raise her new daughter, and then a son.

Trish returned to her career and public service in 2017 when she was hired by the City of Concord. She worked as the executive assistant to the City Manager and City Council for almost 3 years and was then promoted to her current position as the Emergency & Volunteer Programs Manager for the City assigned to Concord Police Department.