Burlington


There are five antennas. The leftmost mast holds the UHF link antenna (corner reflector) and the UHF repeater antenna (fiberglass stick). The center two antennas belong to our host's EOC (two tribanders: one is 2m/220/440 tribander, the other is 6m/2m/440). The rightmost antenna is the 2m repeater's DB224.


The Burlington repeater is built in a Digital Equipment Corporation computer rack. At the bottom of the rack is the Mastr II power supply - which powers the RF and power amp units of the VHF repeater. Next up is the Astron power supply, which powers the UHF repeater as well as the shared controller and link radio. Above the Astron is the Mastr II RF unit which is the VHF repeater. Next is the Motorola Radius link radio and above that is the Motorola M10 receiver and M120 transmitter which comprise the UHF repeater.

Above the UHF repeater, the SCOM 7K controller and home brew display panel finish up the MMRA VHF and UHF repeaters.

Above the MMRA repeaters is the Clay Center Amateur Radio Club's 447.025 repeater. Behind their repeater, mounted to the back side of the rack, you can see one of the cavities of the MMRA's UHF repeater.



A north looking view from the roof. Broadcast station WRKO is located very nearby.
The photo to the left is of the antennas at the old Stoneham site. This MMRA repeater was originally located in Stoneham at the New England Memorial Hospital (also known as the Stoneham hospital), in the 1970's. It remained there through multiple ownership changes and even for many years after the hospital went out of business. In Spring 2008, MMRA was notified that the hospital was to be torn down. Power is to be cut at the building in 2009. Thus began the effort to find a new site.

On October 18, 2008 a crew of fifteen removed all the MMRA equipment, as well as some other ham equipment, from the Stoneham facility and reinstalled it at our new Burlington location. Downtime for the 2m repeater was less than six hours.



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