222 MHz

Antenna #1: 4 x 16 element DSFO222-16 yagis @ 106 ft

Antenna #2: 8 X 5 element LVA yagis sidemounted on the tower leg.

Antenna #3: 2 X 8 element rear mount yagis @80 ft. on a sidearm and rotatable from West through North to East. (NE array)

Antenna #4: 222-10RS Yagi for FM operation at 50 ft.

Receiver Ten Tec OMNI V with DEMI transverter and "bathtub sized" custom 222 MHz bandpass filter.

Driver amplifier is a Teletek solid state amplifier into a homebrew W6PO 8877 triode amplifier for 222 MHz

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222 MHz 100 ft. Rohn 45 tower. The top yagis are 16 element K1FO designs all fed with LMR-400 and rotated by a Tail Twister rotor. The main feedline is 1 5/8" Heliax, with a second 7/8" run of Heliax to the 8 yagi LVA on the side of the tower. The top antenna is at about 90 ft with the bottom LVA at about 66 ft. We have plans to enlarge this side mounted array in the future.

222 MHz operating position just before the VHF contest began in Sept. 2006. There are still tools and assorted boxes of parts strewn everywhere. You can see the 222 MHz exciter, another OMNI V off to the right, with an FM radio sitting on top. Above them are two rotor boxes for the quad array, and also the Northeast 2 X 8 element array. A third rotor, a Tic Ring rotor is hidden behind the yellow plastic box, and is used for FM on 223.5 and 440FM. The bandpass filter is visible on a a shelf in the equipment rack, with a Bird 43 and sequencer above it. The commercial Teletek driver amplifier is in the rack above the power meter, with the W6PO 8877 amplifier above that. A highly modified TS-830S above the rotor boxes acts as a second receiver on the band.

Another view of the 222 antenna system. The 2 X 8 element side mounted yagis are located on another tower, and not visible here.

The 222 operating position is at the far end of the room. N2CEI is sitting in the operating chair, with W1SD next to him on 432, and WA1T in the foreground at one of three microwave positions, pondering the rf output meter for 2304 no doubt. Sandra, from Downeast Microwave is discussing things with W1SD. Sandra, an RPI grad, keeps the computers running correctly. This room usually has four positions manned during high activity periods. It gets real busy!! We really need that air conditioner on the far wall. It gets hot without it!