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The Milton 2m repeater is a Kenwood NXR710 feeding a Henry Radio C130AB30R amplifier. Output power is about 70W. The 1.25 cm machine is a Spectra Engineering MX800 with an output power of 50W. Both repeaters are controlled by an SCOM 7330.
In the photo, the Henry amp is on the top, followed by the Kenwood, then the Spectra. The 7330 is below the RF equipment. The link radio and computer networking equipment is below the 7330, just above the Meanwell switching power supply. |
All MMRA repeaters are controlled via internet connections. The Raspberry Pi, Cradlepoint router, and Netgear LB1121 Mi-fi device are to the left of the UHF link radio.
Behind the rack, you can see the 220 duplexers. The 2m duplexers are in the grey cabinet on the floor. Due to the "aggresive" RF environment, there is a notch filter (the gold can in front of the duplexer cabinet) and a 2MHz DCI bandpass filter which is barely visible on top of the same cabinet. |
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The Milton repeater is currently on a temporary V2000 antenna. When the final antennas are install, 2m will have an Andrew DB224 4-bay dipole array antenna. 222 will have a Telewave ANT220-D3. There is also a 3-element yagi for the RF link.
* Photos coming when the antennas are installed * |
The Quincy Era - ~1975-2025
The Milton (formerly Quincy) repeater first went on the air from Quincy city hospital in the 1970's.
In 1982, the Quincy repeater was relocated to Forbes Hill. The granite structure you see in the photo was built in 1902. It surrounds a steel standpipe which at one time was part of the Quincy city water supply. When built, the structure featured an observation deck at the top which was open to the public. The standpipe was decommissioned in the 1950s and replaced with a reservoir in the Blue Hills.
Due to impending construction, the repeater was removed from Forbes Hill in early 2025. It was installed at its current site on July 15, 2026. |
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This is the 2022 version of the repeater and its configuration when it was removed from Forbes Hill. It is the same equipment which is now in service at the new site.
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This is the previous version of the repeater after a rebuild in 2016. This configuration existed from 2016 through 2022. The Mastr-II 224.400 repeater is located at the top of the rack with the Mirage power amp located above the Mastr-II. The SCOM 7330 controller is in the center, with the Mastr-II 146.67 repeater below it. At the bottom, an Astron SRM-50M power supply provides 13.8VDC for the entire system.
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These photos show the repeaters prior to the 2016 rebuild. Previously, the 222 machine was
sitting on a shelf behind the 2m cabinet. |
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Pictures from the Quincy April 29, 2007 work party can be seen here.
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