Boston/Back Bay


Like all MMRA 2m repeaters, the Boston repeater is a GE Mastr II receiver/transmitter controlled by an SCOM 7330. However, '82 is the only MMRA 2m repeater that does not use a DB224 antenna. Due to space limitations on the Pru roof, it uses a DA-1502, manufactured by a company in Ukraine. It is similar to the Andrew DB222 antenna, a 2-bay version of the 224. Andrew discontinued production of the DB222 so it is no longer available from them.

Our site host provides us with about 3 feet of rack space. The SCOM controller is at the top. Below that is the Astron switching power supply followed by an APC remote power switch. The GE MastrII TX/RX is on the bottom. The Motorola GM300 link radio, used to pick up transmissions from the remote receiver site, is built into the MastrII and is not visible. You can see the 6-cavity Sinclair duplexer behind everything. Just to the right above the power supply, you can see the DCI bandpass filter and Raspberry Pi, which allows us to access the controller over the internet.

Here's the MMRA's DA-1502 antenna on its high perch
Looking down on the 927.0625 site from the 146.82 site

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