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 Announcements page for more.)

Holiday Banquet
Sunday, December 10th, 2023; 6:00 PM
Zio Fraedo's in Pleasant Hill

Register by Thursday, Nov 30


Upcoming License Testing
Friday, December 15, 2023 @ 5:00 PM
Clayton Valley Presbyterian Church
1578 Kirker Pass Road, Clayton


Licensed for six months or less?

QRZ Jumpstart offer


Join/Renew your Membership for 2024

by Dec 31st to be included in the Club Directory.


We held three Auxiliary Classes in 2023.

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

EMCOMM:  Preparation and Training (An Overview)
by Bill Shaffer N6SGT

See Class Details for videos.


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

Attend Meetings

Friday, December 15
No meeting.
Join us at our Holiday Banquet on Sunday Dec. 10.


Hybrid Meeting!

Both In-Person and on Zoom

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 Service Club


MDARC Membership supports our voice & ATV repeaters (W6CX), Packet / APRS,

Education & Testing, Public Service, Activities and is

tax deductible.

Update Member Directory listings on the

Member Portal

Register for
Technician, General

and Auxiliary


W6CX Repeaters

Atop Mt Diablo our repeater systems are among the best in Northern California!

Support our repeaters!

Join us and/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.

Amateur Radio Event Support

MDARC can help provide Amateur Radio communications support for your event and assistance planning better event communications, event safety and event coordination. We can support all event areas including areas where cell phones do not work, SAG/Sweep Vehicles, Rest Stops, Water Stations, etc. Contact the MDARC Public Service Coordinator listed on the Public Service Page for assistance.

Join our Club Groups.io email list to stay up to date on what's happening in the Club, meeting announcements, etc. For details see Communicating With You

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.