Billerica
147.120



 Since the 1970's, the 1200 Radio Club operated 147.12/W1DC repeater. The club consisted primarily of Honeywell employees. When Honeywell left the area, the club survived for many years, but attrition did finally win. In August, 2021, the remaining members of the 1200 Radio Club voted to transfer ownership, and responsibility for operating and maintaining the repeater to MMRA. MMRA voted to accept the repeater.

The W1DC callsign was transferred to MMRA as MMRA/1200 Radio Club, with W1USN as trustee.

As part of the transfer, the 1200RC gave MMRA a number of upgrades that were purchased but never implemented. The new repeater was built over the winter 2021-22 and was installed on April 22, 2022. The entire site was relocated on November 19, 2025 and a 220 repeater was added.

The Billerica Repeater System (from top to bottom):
  • Rasperry Pi/Router/Netgear LB1120 to provide internet access (small boxes on top)
  • Spectra Engineering MX500 222 MHz repeater.
  • SCOM 7330 Controller
  • Motorola M120 Link Radio
  • Kenwood TKR-750 repeater
  • 100W Mastr II Power Amplifier
  • Astron SS-50M Power Supply
  • 6-Cavity Phelps-Dodge Duplexer (not pictured)
    • At the old site: On October 27th, 2022, MMRA replaced W1DC's forty-year-old Stationmaster MMRA. As part of the replacement, we replaced the entire Rohn-25 support tower as well. The new DB224-E is mounted to 18 feet of 2" galvanzied pipe. You can also see the HUB link antenna located about 6 feet up on the left.

    November 19th, 2025: These antennas have all been relocated to the new site.
    The photos below show the old Billerica repeater & antenna that operated from the mid 80's until 2022.


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