MDARC provides a wide variety of programs and activities for its members. These include hosting and staffing PACIFICON (ARRL Pacific Division convention) each October, bringing in great speakers and offering ham radio classes to the public. Our annual picnic, holiday party and radio equipment auction are all enjoyable events!

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

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.

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Register for One of our
Training Courses or Classes

General Club Meeting

Friday, August 19,
7:00 PM

3D Printing for
Ham Radio

Alan Biocca, W6AKB

See the details on our
Speakers page.

Hybrid Meeting!

Both In-Person and on Zoom

Our Savior's Lutheran Church

1035 Carol Lane

Lafayette CA

Special Services Club

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

W6CX Repeaters

Our Repeater systems are among the best in Northern California!

Help us support our Repeaters!

Join us or Donate

You can donate to MDARC just by shopping at AmazonSmile.Com.

Click Here for details.

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

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


Announcements page for more.)

August, 2022 Board Meeting Canceled
The MDARC Board of Directors meeting, scheduled for August 1, 2022, has been cancelled, per an announcement by President Ed Morales on Saturday, July 30.

New (Old) Carrier

Thanks to our Outreach Coordinator, Dick Wade, WM6G, we've found another Carrier newsletter to add to our history section. This one is the Carrier for April, 1970 and is the only one we have between 1960 and 1977. Have a look at it from our Carrier page.


Tuesday, July 5, 2022, 7:00 - 9:00 PM

Introduction to Winlink

by John Trinterud, K9ONR

Odd Fellows Pacheco Lodge

4349 Cowell Road

Concord, CA 94518


Level 1: Technician License Course-2022-B

Each Tuesday, July 19 - September 6, 2022

(8 sessions)

Held via Zoom and in person

Odd Fellows Pacheco Lodge

4349 Cowell Road

Concord, CA 94518

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.