SEMARA Repeaters & Digital Systems

SEMARA owns and operates three analog voice repeaters, plus an APRS digipeater station.  These four systems are situated at the rear of club property below a 180 foot multiple tenant communications tower.  SEMARA, which has exclusive rights to the top of the tower, has dedicated 1-5/8" Andrews Heliax feedlines for its systems.

The tower also hosts numerous wireless providers through NETCOM, including AT&T Mobility, MetroPCS, Sprint Nextel, T-Mobile USA and Verizon Wireless.  Several public safety and commercial systems including repeaters for the Dartmouth Fire Department (District 1) and Tremblay's Bus Company, plus a voted receiver for the Dartmouth Police Department's digital P25 repeater are also located on this tower.

For more information on one of SEMARA's systems, simply click on its link to jump to a full description:



147.000 Dartmouth Repeater

SEMARA proudly owns and operates the 147.000 Dartmouth Repeater.  It carries the club call sign of W1AEC.  It is open to all radio amateurs without requiring membership.  This is a full service 100 watt repeater with an antenna height of about 150 feet above average terrain (HAAT).  The system features a wide-area coverage including all of Southeastern Massachusetts.  Fixed and mobile station coverage includes Providence and most of eastern Rhode Island, most areas south of Boston, and the western half of Cape Cod and the Islands.

In times of real emergencies, all normal communications must cease to allow for priority traffic.  This repeater is affiliated with Massachusetts RACES (Region 2, Sector A).  Our sector's on-air RACES drill is held on this repeater the first Monday of each month at 7:30pm.  The repeater has auxiliary power, with the ability to stay on the air for days at a time without commercial power.  If the site's primary 120 VAC power is lost, the 100 watt amplifier is switched out of service and the repeater runs at 20 watts output to conserve battery power.

Extending coverage beyond the limits of RF, this repeater system supports the the VoIP networks of IRLP and EchoLink for inbound and outbound connections.  These two networks allow any amateur using the repeater to link to other amateurs across the country or around the world.  The internet connection is provided by Comcast Business Class and is supplied to the repeater site building from the clubhouse via a control cable in a dedicated underground conduit.  Like the repeater itself, all amateurs are welcome to use these links without requiring membership.


Overview


Location: NETCOM Communications Tower
54 Donald Street
Dartmouth, Massachusetts

Established: 1974 (WR1ADR)

Call Sign: W1AEC

Band: 2 Meters (VHF)

TX Frequency (Output): 147.000 MHz

RX Frequency (Input): 147.600 MHz (+600 kHz)

CTCSS (PL): 67.0 Hz

Output Power: 100 Watts (20 Watts Auxilary)

IRLP Node: 4210

EchoLink Node: 4210 (W1AEC-R)

Linked To: none (node normally idle)



224.800 Dartmouth Repeater

More information will be added in the future.

Overview


Location: NETCOM Communications Tower
54 Donald Street
Dartmouth, Massachusetts

Established: 4/13/2011

Call Sign: W1AEC

Band: 1.25 Meters (VHF)

TX Frequency (Output): 224.800 MHz

RX Frequency (Input): 223.200 MHz (-1.6 MHz)

CTCSS (PL): 67.0 Hz In
88.5 Hz Out (Temporary)

Output Power: 20 Watts

IRLP Node: 4215*

EchoLink Node: 4215 (W1AEC-L)*

Linked To: Quahog Repeater Network (QRN)*

* Links currently unavailable but coming sometime in 2014.


927.8375 Dartmouth Repeater

More information will be added in the future.

Overview


Location: NETCOM Communications Tower
54 Donald Street
Dartmouth, Massachusetts

Established: 9/19/2009

Call Sign: W1AEC

Band: 33 Centimeters (UHF)

TX Frequency (Output): 927.8375 MHz

RX Frequency (Input): 902.8375 MHz (-25 MHz)

CTCSS (PL): 67.0 Hz

Output Power: 150 Watts

IRLP Node: 4617

EchoLink Node: none

Linked To: New England Amateur Radio
900 MHz (NEAR-900) Network



144.390 Dartmouth APRS Digipeater

More information will be added in the future.  This APRS station is running on a temporary Kantronics TNC loaned by Jeff-N1ZZN.  iGate functionality will be restored sometime in 2014 with plans to build and install a TNC-Pi.