MDARC provides a wide variety of programs and activities for its members. These include hosting and staffing our Campout and Field Day each June, PACIFICON (ARRL Pacific Division convention) each October, public service events, great monthly meeting speakers, newsletter, ham radio classes, license testing and weekly on the air nets. Our annual holiday party and radio equipment auction are all enjoyable events!

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See our PACIFICON site for details on the best ham radio convention in the Western United States! 

October 20th, 21st and 22nd, 2023



(See Announcements page for more.)

Upcoming License Testing
Saturday, October 21, 2023 @ 8:00 AM
San Ramon Marriott
2600 Bishop Dr, San Ramon


Licensed for six months or less?

QRZ Jumpstart offer


We held two Auxiliary Classes.

Why Does Ham Radio Work
"When all else fails"?
by Kristen McIntyre, K6WX, ARRL Pacific Division Director


Phones, Fires, and Failures
by Alan Thompson, W6WNU

See Class Details for videos.


Our Amateur Extra Class license course is ongoing.
Class Details

General Club Meetings

Friday, October 20, 7PM
At Pacificon:
EmComm: Yesterday, Today and Tomorrow
Panel Discussion

Hybrid Meeting!

Both In-Person and on Zoom


San Ramon Marriott

2600 Bishop Dr

San Ramon CA


Our Savior's Lutheran Church

1035 Carol Lane

Lafayette CA

See the details on our
Speakers page.

We meet upstairs in Oak View 3. Park in the Upper Parking Lot. Testing is also upstairs. Ask anyone when you arrive.

Please see our COVID-19 statement before attending any Club in-person meeting or event.

Thanks for participating during

June 24 & 25, 2023 Field Day!

Olympic High School

2730 Salvio Street, Concord, CA

We look forward to seeing you in 2024.

Special Services Club 

Join/Renew Your Membership

Membership in MDARC includes autopatch access to all three MDARC voice repeaters (W6CX). We also maintain an ATV repeater, and support Packet / APS EchoLink, and IRLP. The W6CX D-STAR repeater is operational and connected to our gateway on the Internet. 

Member Portal | Read More

Register for One of our
Training Courses or Classes

W6CX Repeaters

Our Repeater systems are among the best in Northern California!

Help us support our Repeaters!

Join us or Donate

We accept donations to the club via PayPal. Please click this link to make a donation.

Note: MDARC is a 501(c)3 organization.

How to have Amateur Radio support for your event 

If you would like Amateur Radio Communications support for your event and for assistance in planning for better communications and safety concerns and event coordination, we can help. MDARC can provide communications support for all areas where the event is taking place as well as in areas where cell phones do not work. We also can provide communications for the SAG/Sweep Vehicles, Rest Stops, Water Stations, etc. Please contact the MDARC Public Service Coordinator listed on the Public Service Page for assistance.

Join our Club Groups.io email reflector, to stay up to date on what's happening in the Club, meeting announcements, etc. See our Communicating With You page for details. 

Mount Diablo Amateur Radio Club

The Mount Diablo Amateur Radio Club (MDARC) was founded in 1947. Today it has a membership of over 300 dedicated hams and is one of the largest amateur radio clubs in California. MDARC's purpose is to encourage innovation in amateur radio, provide public service and educational opportunities, foster goodwill within our community, and have fun in the process.