MDARC - Mount Diablo Amateur Radio Club

04/25/2026

Come out and hang out with the Delta Amateur Radio Club at Big Break Regional Shoreline on Saturday, April 25th from 0800-1400.

We're activating (not POTA activation), just getting active - Radio Active!! as a pre-field day Gear Check.

If you need talk-in guidance, we will be monitoring W6CX and WA6HAM for people who need driving directions.
For people who have arrived in the parking lot, you can call into 146.52 or 446.000 and we will guide you to our operating location.

Come on over!

Take Care & 7 3,
Jim - KD7G
ARES District Emergency Coordinator - Contra Costa County
PACIFICON2026 Registration & Marketing Chair
President - Delta ARC

04/20/2026

My Fellow Hams,

MDARC has a Public Service walk in Civic Park in Walnut Creek for the Cancer Society, on May16, 2026, at 8:00 a.m. That is less than one month away.

I am writing to you to put the 2025 Cancer Hope Walk event on your calendar for next month.

We will be stationed at Hydration Stations and at key locations along the walking route on the Iron Horse Trail. We will be looking for any problems with the walkers that are participating in the walk

We encourage you to volunteer for this very worthwhile public service event, benefitting the Cancer Society. MDARC has supported this event for many years. This walk is HT compatible, using the MDARC repeater, W6CX.

We welcome back the hams that served in this event last year, and welcome hams that have never served in the Cancer Society Walk before.

Please put this event on your calendar and let me know that you are interested in participating by contacting me at ..
We welcome all hams that would like to participate in this worthwhile event.

Thank you.
73,

Larry, KI6LNB

04/12/2026

HAMCRAM ONE-DAY AMATEUR RADIO LICENSE COURSE + TEST SESSION
GET YOUR HAM RADIO LICENSE IN JUST ONE SATURDAY
SATURDAY, APRIL 25TH, 2026
DOORS OPEN 7:45 AM
STOCKTON FIRE STA 13 OES ROOM
3606 HENDRIX DR
STOCKTON, CA 95212

Here's your chance to get your license and join the fun of ham radio! Did you know that during the recent storms and flooding around the country, ham radio operators were still able to communicate, able to access their own email, data and internet sites. Ham radio operators are the vital links that help communities through a natural disaster - If you are interested in doing a HamCram Study Session to get your Technician License, OR you are upgrading to General or Extra Class, OR you or a family member wants to get your license, HamCram is one of the most efficient methods to getting your license in just one day.

Please pre-register at https://w6sf.org/hamcram/

HamCram study session starts at 8:05 AM and the doors will open at 7:45.
The Test Only sessions will start at 3:00 PM. Please call 209-687-0774 for more information.

HamCram Get Your Amateur Radio License on a Saturday!You can get your Amateur Radio License in a single Saturday. No Morse code test is required!Attendance at each event is limited, Preregistration is required! Thousands have gotten their licenses by studying the actual questions and answers, some o...

03/04/2026

My Fellow Hams,

The Diablo Trails Challenge is coming up on Saturday, April 4, 2026.

It is a running race from Castle Rock Park in Walnut Creek to the top of Mt. Diablo, and back to Castle Rock Park.
MDARC has been asked to provide the situational awareness and emergency communication for the event due to the lack of reliable phone service on the mountain.

This event provides the opportunity for all hams of any experience to provide support from different assignment locations. All ham radio assignments are drive-up assignments on the mountain, unless you volunteer otherwise. Most assignments can be done with an HT using the MDARC repeater located at the top of the mountain.

We encourage you to volunteer for this very worthwhile public service event, benefitting Save Mt. Diablo. MDARC has supported this event for many years.

Please put this event on your calendar and let me know if you are interested in participating, at

There are many assignments on the mountain to be filled.
Please let me add your call sign to the confirmation list. I hope to hear from you soon.

73,
Larry, KI6LNB

03/04/2026

Are you a Technician Class license holder? Have you thought about upgrading to General? Now is the time to act! MDARC will once again offer its 9-week General Class license upgrade course beginning March 24th. The General License course is offered only once each year. Don't miss out!

The class will meet each Tuesday, March 24 - May 19, 2026
(9 sessions)
7:00-9:00 p.m.
Held via Zoom and in-person at:
Clayton Valley Presbyterian Church
1578 Kirker Pass Road
Clayton, Ca 94517

Please go to https://www.mdarc.org/education-and-testing/class-details for complete details and to register.

Education and Testing: Class Details | License Testing | Auxiliary | On-Line Resources | Exam.Tools

02/24/2026

Congratulations to our two 2025 award winners! John Rio, N6RIO, won the 2025 Ham of the Year Award, and Bruce Alcorn, KK6SQM, won the Kilroy Key Award for 2025. Both men generously donated many hours of time and talent to our club and we're grateful for your service! Trevor Hall, WA6JAU, made the presentation at the February club meeting.

02/07/2026

Upcoming Public Service Events:

ORCA - Oakland Marathon - Running Race
Sunday, March 22, 2026
Running Race in Downtown Oakland
Radio Coordinator: Mike P***a, KB6MP
https://www.ww6or.org/om

MDARC - MS Walk
Sunday, April 19, 2026
Walk at Heather Farms in Walnut Creek
Click here to sign-up as volunteer 🙋
Radio Coordinator: Larry Loomer, KI6LNB
https://events.nationalmssociety.org/2595

LARK - Devil Mountain Double Century Bike Ride
Saturday, April 25, 2026
Bike Ride in San Jose
Radio Coordinator: George Moorehead, KG6GEM
https://www.signupgenius.com/go/10C0844AEAD28A6FA7-2022
https://devilmountaindouble.godaddysites.com/

MARS - Ridge to Bridge Bike Ride
Saturday, April 18, 2026
Bike Ride in Marin County
Click here to sign-up as volunteer 🙋
See: Larry Loomer, KI6LNB
https://ridgetrail.org/ridge-to-bridge/

LARK - Devil Mountain Double Century Bike Ride
Saturday, April 25, 2026
Bike Ride in San Jose
Radio Coordinator: John Street, WB6ETY, [email protected]
https://www.signupgenius.com/go/10C0844AEAD28A6FA7-2022
https://devilmountaindouble.godaddysites.com/

02/07/2026

EVERYONE who has heard the jammer, please file a complaint with the FCC at;

Submit a request – FCC Complaints

full link here - https://consumercomplaints.fcc.gov/hc/en-us/requests/new?ticket_form_id=38844

Please share this FCC complaint form to everyone that you know that is affected by this jammer. Thank you!

Consumer Inquiries and Complaint Center Browser compatibility Download a Complaint Form File a complaint using our ASL Hotline

12/10/2025

Winter Field Day is all about sharpening your emergency communication abilities. As stated on their website "This isn’t a contest—it’s an experience."
See https://winterfieldday.org/sop.php for full message.
To sign up - https://winterfieldday.org/index.php
Seehttps://winterfieldday.org/downloads/2026-rules-v3.pdf for full rules

12/04/2025

HAMCRAM ONE-DAY AMATEUR RADIO LICENSE COURSE + TEST SESSION
GET YOUR HAM RADIO LICENSE IN JUST ONE SATURDAY
SATURDAY, DECEMBER 13TH, 2025.
DOORS OPEN 7:45 a.m.
STOCKTON FIRE STATION #2 BRET LAWES CLASSROOM
110 W SONORA ST, STOCKTON, CA 95202

Here's your chance to get your license and join the fun of ham radio! Did you know that during the recent storms and flooding around the country, ham radio operators were still able to communicate, able to access their own email, data and internet sites. Ham radio operators are the vital links that help communities through a natural disaster - The next HamCram study and test session will be held at: Stockton Fire Station #2 - Bret Lawes Classroom, 110 W Sonora St, Stockton, CA 95202 If you are interested in doing a HamCram Study Session to get your Technician License, OR you are upgrading to General or Extra Class, OR you or a family member wants to get your license, HamCram is one of the most efficient methods to getting your license in just one day.

Please pre-register at https://w6sf.org/hamcram/

HamCram study session starts at 8:05 a.m. and the doors will open at 7:45.
The Test Only sessions will start at 3:00 p.m.. Please call 209-687-0774 for more information

HamCram Get Your Amateur Radio License on a Saturday!You can get your Amateur Radio License in a single Saturday. No Morse code test is required!Attendance at each event is limited, Preregistration is required! Thousands have gotten their licenses by studying the actual questions and answers, some o...

12/04/2025

Join us for the next Technician License class beginning January 6, 2026!
This is the link to register for the class:
https://lp.constantcontactpages.com/ev/reg/fbx9b32/lp/e0c68002-7cc8-4fa3-acf9-4ad4b075cd62