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.)
We now have two Auxiliary Classes available for registration.
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

Sign up on our Class Details page.


Our General Class and Amateur Extra Class license courses are now OPEN For Registration!
Sign up on our Class Details page.

Upcoming License Testing
Friday, June 16, 2023; 5:30 PM
Our Savior's Lutheran Church
1035 Carol Lane, Lafayette


Licensed for six months or less?

QRZ Jumpstart offer


June 24 & 25, 2023

Olympic High School, 2730 Salvio Street, Concord, CA

General Club Meeting

Friday, Jun 16, 7PM
Go Kits

By Vince d'Eon, VE6LK

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

Our meeting room has moved!!

We're now meeting upstairs, in room
OAK View 3, down the hall from the Sanctuary. Park in the
Upper Parking Lot
from now on. Testing has also moved upstairs. Ask anyone when you arrive.

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

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

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.