W1AAK - Monkton, Vermont :
This privately-owned site is located in the town of Monkton, Vermont. At an elevation of 1,250 feet, this site offers a commanding view up and down the Champlain Valley. Located at this site are two-way radio, cellular telephone and several paging systems, a microwave relay system and a TV translator. The amateur UHF repeater located here was first put into operation in 1993. The equipment used for this first station was a General Electric Masta Pro. In 2000 the original station was replaced by a Motorola Micor repeater, which operates on 444.650 / 449.650 MHz. Tone-coded squelch frequency is 110.9 cps. A dB Products Model 40165 band pass band reject duplexer is used. Transmitter power output from the duplexer is maintained at about 40 to 50 watts, which is fed to an old Andrew 5.8 dB gain antenna. Transmit and receive audio, keying, tone squelch logic and control is accomplished with a Link-Comm RLC-1 repeater controller.
(Update 1/03) In the process of re-engineering some of the communications systems antennas and feed lines at this site, NFMRA was invited by the site owner to move its equipment to a different building and relocate its antenna to a new and higher location on another tower at the site. Since this was a move that would enhance coverage of the repeater and also provide a location for a link antenna we jumped at the chance. In early December, 2002, the station was moved. A DB Products Model 404, four-bay antenna replaced the old Andrew "stick". This antenna was placed at the 100 foot level and fed with 7/8 inch heliax cable. A GE Phoenix SX dash mount radio was added for used as the link connection to Mt. Killington. The antenna used at this time was a single dipole antenna that was already in place on the tower. This antenna is located at the 175 foot level. From this height, although not 100 percent reliable, provides a marginal to fair RF path to the Mt. Killington hub station. Replacing the dipole antenna with a directional antenna and replacing the feed line with some low loss heliax should make a remarkable improvement on the path to Mt. Killington. These changes are planned for the future.
(Updated 11/03) A 5 dB gain yagi antenna fed with 7/8 inch helax was installed 10/03. This improvement did add considerable gain to the path but did not improve the situation as well as expected. However, a reliable path to Killington is available most all of the time.
Soon after the equipment was moved to its new location a packet station was put into operation at the site. This system operates on a UHF frequency and uses the antenna that was previously used for the link unit. More info on the packet system will be forth coming.
An APRS station was put into operation here during the summer of 2009. The intent here is to improve APRS coverage southerly down RT.116 to the Middlebury area as well as along the eastern New York border.
(Up dated 10/13) Early this year the site owner requested that the NFMRA remove it's antennas from the tower (see picture #3). Luckly, use of the location where the repeater first resided was available, so now its back at its original location. The Motorola Micor equipment was replaced with a Motorola MSF-5000 station. The antenna used, a four-bay dipole, which can be seen in the picture below about one third of the way up on the left side of the tower, was the antenna previously used by the W1EU repeater. Other than replacement of the main repeater, all other equipment remains the same.
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