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    • Digital Voice
      • Comparison of DV Modes
      • D-Star
        • D-Star Linking
        • D-Star Registration
      • DMR
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      • M17
    • EchoLink & IRLP
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    • Meshtastic
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      • Award Recipients
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      • History Summary
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      • Rocky Ridge Group
      • Silent Keys
      • W6CX
      • W6LGW
    • Join/Renew/Update
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      • Zoom Guidelines
    • Store
    • Managing Gmail
    • Managing Groups.io
  • Carrier Newsletter
  • Activities
    • Auction
    • Campout Party
    • Digital Systems
      • DMR
      • NBEMS
      • Winlink
    • DX & Contests
    • Emergency Communications
      • Wilderness Protocol
    • Field Day
    • Holiday Banquet
    • Leap Day Net
    • Nets on MDARC Systems
    • Nets on Other Systems
    • Pacificon Table
    • Vehicles
      • Trailer
      • Van
  • Operating Aids
    • Azimuthal Map
    • Calling Frequencies
    • CTCSS (PL)
    • Greek Alphabet
    • Latitude, Longitude, UTM
    • Lending Library
    • LSB or USB?
    • Metric System
      • Metric Units
      • Metric Prefixes
      • Metric Conversions
    • Morse Code
    • Operating Procedures
    • Phonetic Alphabet
    • Q-Signals & Prosigns
    • Roman Numerals
    • RST System
    • UTC Time
    • Weather Channels
  • Resources
    • Basics
    • Clubs in NorCal, NV
    • Donate to MDARC
    • Equipment
      • Dipole Length Calcs
      • Dipole Tuning
      • HF Equipment
      • IP Codes
    • Getting Started in Ham Radio
      • 1. License Class Description
      • 2. Getting Your First License
      • 3. Upgrading Your License
      • 4A. Getting On the Air
      • 4B. Getting On the Air-HF
      • 5. Choosing Your First Radio
      • 6. What Do Hams Do
      • 7. Where did “Ham” Come From?
    • Glossary
    • Links of Interest
    • Other Ham Groups
  • Regulations
    • Amateur Radio Bands
    • Amateur Radio Regulations
    • Emission Designators
    • FCC Monitoring Stations
    • License Copy Acquisition
    • Line A, Line C
    • Obtain an FRN
    • Secondary Status
    • Spectrum
  • Safety
    • Electric Current in the Human Body
  • Technical
    • Coax & Ladder
    • Conductor Properties
    • Constants and Formulas
    • Decibels
    • Peak Envelope Power
    • Periodic Table
    • Schematic Symbols
    • Skin-Effect
MDARC
  • Home
  • Membership
  • Meetings
    • General Meetings
    • Speakers
      • Speakers 2023
      • Speakers 2021-2022
      • Speakers 2019-2020
      • Speakers 2017-2018
      • Speakers 2015-2016
    • Board Meetings
    • Technical Meetings
    • Pacificon Meetings
    • Digital Media Meetings
  • Education and Testing
    • Class Details
    • License Testing
    • Auxiliary Classes
    • On-Line Resources
    • Exam.Tools
  • Public Service
  • Repeater Systems
    • ATV
    • Digital Voice
      • Comparison of DV Modes
      • D-Star
        • D-Star Linking
        • D-Star Registration
      • DMR
      • C4FM (Fusion)
      • M17
    • EchoLink & IRLP
    • Repeater Rules
    • Repeater Weather
    • Meshtastic
  • About Us
    • COVID Statement
    • Club Announcements
    • Committees
    • Communicating with You
    • Contact Us
    • History of the Club
      • Award Recipients
      • Charter Members
      • History Summary
      • Photos, Videos
      • Members-Special
      • News of the Club
      • Past Officers
      • QSL Cards
      • Rocky Ridge Group
      • Silent Keys
      • W6CX
      • W6LGW
    • Join/Renew/Update
    • Officers & Chairs
    • Official Documents
      • Articles of Incorporation
      • Bylaws
      • Equipment Selling
      • Groups.io Guidelines
      • Policies
      • Privacy Policy
      • Record Retention Policy
      • Terms of Use
      • Zoom Guidelines
    • Store
    • Managing Gmail
    • Managing Groups.io
  • Carrier Newsletter
  • Activities
    • Auction
    • Campout Party
    • Digital Systems
      • DMR
      • NBEMS
      • Winlink
    • DX & Contests
    • Emergency Communications
      • Wilderness Protocol
    • Field Day
    • Holiday Banquet
    • Leap Day Net
    • Nets on MDARC Systems
    • Nets on Other Systems
    • Pacificon Table
    • Vehicles
      • Trailer
      • Van
  • Operating Aids
    • Azimuthal Map
    • Calling Frequencies
    • CTCSS (PL)
    • Greek Alphabet
    • Latitude, Longitude, UTM
    • Lending Library
    • LSB or USB?
    • Metric System
      • Metric Units
      • Metric Prefixes
      • Metric Conversions
    • Morse Code
    • Operating Procedures
    • Phonetic Alphabet
    • Q-Signals & Prosigns
    • Roman Numerals
    • RST System
    • UTC Time
    • Weather Channels
  • Resources
    • Basics
    • Clubs in NorCal, NV
    • Donate to MDARC
    • Equipment
      • Dipole Length Calcs
      • Dipole Tuning
      • HF Equipment
      • IP Codes
    • Getting Started in Ham Radio
      • 1. License Class Description
      • 2. Getting Your First License
      • 3. Upgrading Your License
      • 4A. Getting On the Air
      • 4B. Getting On the Air-HF
      • 5. Choosing Your First Radio
      • 6. What Do Hams Do
      • 7. Where did “Ham” Come From?
    • Glossary
    • Links of Interest
    • Other Ham Groups
  • Regulations
    • Amateur Radio Bands
    • Amateur Radio Regulations
    • Emission Designators
    • FCC Monitoring Stations
    • License Copy Acquisition
    • Line A, Line C
    • Obtain an FRN
    • Secondary Status
    • Spectrum
  • Safety
    • Electric Current in the Human Body
  • Technical
    • Coax & Ladder
    • Conductor Properties
    • Constants and Formulas
    • Decibels
    • Peak Envelope Power
    • Periodic Table
    • Schematic Symbols
    • Skin-Effect
  • More
    • Home
    • Membership
    • Meetings
      • General Meetings
      • Speakers
        • Speakers 2023
        • Speakers 2021-2022
        • Speakers 2019-2020
        • Speakers 2017-2018
        • Speakers 2015-2016
      • Board Meetings
      • Technical Meetings
      • Pacificon Meetings
      • Digital Media Meetings
    • Education and Testing
      • Class Details
      • License Testing
      • Auxiliary Classes
      • On-Line Resources
      • Exam.Tools
    • Public Service
    • Repeater Systems
      • ATV
      • Digital Voice
        • Comparison of DV Modes
        • D-Star
          • D-Star Linking
          • D-Star Registration
        • DMR
        • C4FM (Fusion)
        • M17
      • EchoLink & IRLP
      • Repeater Rules
      • Repeater Weather
      • Meshtastic
    • About Us
      • COVID Statement
      • Club Announcements
      • Committees
      • Communicating with You
      • Contact Us
      • History of the Club
        • Award Recipients
        • Charter Members
        • History Summary
        • Photos, Videos
        • Members-Special
        • News of the Club
        • Past Officers
        • QSL Cards
        • Rocky Ridge Group
        • Silent Keys
        • W6CX
        • W6LGW
      • Join/Renew/Update
      • Officers & Chairs
      • Official Documents
        • Articles of Incorporation
        • Bylaws
        • Equipment Selling
        • Groups.io Guidelines
        • Policies
        • Privacy Policy
        • Record Retention Policy
        • Terms of Use
        • Zoom Guidelines
      • Store
      • Managing Gmail
      • Managing Groups.io
    • Carrier Newsletter
    • Activities
      • Auction
      • Campout Party
      • Digital Systems
        • DMR
        • NBEMS
        • Winlink
      • DX & Contests
      • Emergency Communications
        • Wilderness Protocol
      • Field Day
      • Holiday Banquet
      • Leap Day Net
      • Nets on MDARC Systems
      • Nets on Other Systems
      • Pacificon Table
      • Vehicles
        • Trailer
        • Van
    • Operating Aids
      • Azimuthal Map
      • Calling Frequencies
      • CTCSS (PL)
      • Greek Alphabet
      • Latitude, Longitude, UTM
      • Lending Library
      • LSB or USB?
      • Metric System
        • Metric Units
        • Metric Prefixes
        • Metric Conversions
      • Morse Code
      • Operating Procedures
      • Phonetic Alphabet
      • Q-Signals & Prosigns
      • Roman Numerals
      • RST System
      • UTC Time
      • Weather Channels
    • Resources
      • Basics
      • Clubs in NorCal, NV
      • Donate to MDARC
      • Equipment
        • Dipole Length Calcs
        • Dipole Tuning
        • HF Equipment
        • IP Codes
      • Getting Started in Ham Radio
        • 1. License Class Description
        • 2. Getting Your First License
        • 3. Upgrading Your License
        • 4A. Getting On the Air
        • 4B. Getting On the Air-HF
        • 5. Choosing Your First Radio
        • 6. What Do Hams Do
        • 7. Where did “Ham” Come From?
      • Glossary
      • Links of Interest
      • Other Ham Groups
    • Regulations
      • Amateur Radio Bands
      • Amateur Radio Regulations
      • Emission Designators
      • FCC Monitoring Stations
      • License Copy Acquisition
      • Line A, Line C
      • Obtain an FRN
      • Secondary Status
      • Spectrum
    • Safety
      • Electric Current in the Human Body
    • Technical
      • Coax & Ladder
      • Conductor Properties
      • Constants and Formulas
      • Decibels
      • Peak Envelope Power
      • Periodic Table
      • Schematic Symbols
      • Skin-Effect

About Us: Covid Statement| Club Announcements | Committees | Communicating With You | Contact Us | History of the Club | Join/Renew/Update | Officers & Chairs | Official Documents | Store | Managing Gmail | Managing Groups.io

About Us

The Mount Diablo Amateur Radio Club (MDARC) was founded on January 9, 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 good will within our community, and have fun in the process.

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 Field Day event, holiday party, and radio equipment auction are all enjoyable events!


MDARC General Meeting

Our Savior's Lutheran Church 

1035 Carol Lane 

Lafayette CA


Membership in MDARC includes autopatch access to all three MDARC voice repeaters (W6CX). We also maintain an amateur television (ATV) repeater, a digipeater supporting Packet/APRS (Automatic Packet Reporting System); EchoLink; and Internet Radio Linking Project (IRLP). We also have a multi-protocol digital voice repeater capable of DMR (Digital Mobile Radio); D-Star and C4FM (Yaesu Fusion).

Groups.io Facebook LinkedIn mdarc & pacificonHome Page Contact Us Join/Renew/Update Policies & Guidelines Website Terms of Use Website Privacy PolicySee an error or omission? Let us know with the url.© Mt. Diablo Amateur Radio Club, 2025.The materials on this website may be copied for noncommercial personal use only.
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