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SPECIFICATIONS:
MODEL NUMBER................. 2M9FM OR 2M9SSB FEED / CONNECTOR........... 50 OHMS, "N" FEM.
FREQ. RANGE..................... 2M9SSB=144-146 MHz POWER HANDLING ............. 1500 WATTS
............................................ 2M9FM=145-148 MHz BOOM LENGTH / DIA........... 14' 6" / 1" & 3/4"
GAIN .................................... 12.0 dBd NO. OF ELEMENTS.............. 9
VSWR .................................. 1.4:1 and BETTER TURN RADIUS...................... 8'
FRONT TO BACK................. 24 dB MAST / MOUNTING.............. UP TO 2" / H OR V
BEAMWIDTH, DEG. ............. E=35 / H=40 WIND LOAD / SURVIVAL ..... 1.2 SQ FT / 100 MPH
STACKING DISTANCE......... E=9'6", H=10' WEIGHT ............................... 6 LBS
FEATURES:
Up to the minute design using a state-of-the-art computer optimization program to deliver the most gain for boom
length of any antenna on the market. Each model's performanc is optimized for a specific mode and frequency
range, with no compromises to achieve unneeded bandwidth: the 2M9SSB covers 144-146 MHz and the 2M9FM
covers 145-148 MHz. Where do you want to make yourself heard?
Both models are ideal building blocks for a small turning radius, high-gain stacked array. Two horizontally polarized,
2
vertically stacked 2M9SSB's yield the same gain (14.8 dBd) as M 's 33 ft 2M5WL, but with about 1/2 the turning radius
(8' - great for QTH's that won't permit a long boom yagi). The 2M9FM can be stacked on a crossboom for the same
gain increases, and the turning radius is still a very manageable 10 ft.
The heart of these antennas is a driven element module originally designed for maritime ATS satellite service. All
connectors are O-ring sealed to the CNC machined block. Internal connections are sealed with a space-age silicone gel
with nearly 4 times the dielectric strength of air. The balun connectors are triple sealed on the coax and nut-sealed at the
block connectors. The type "N" feed connector uses a gold-plated, beryllium copper center pin.
Elements are 6061-T6 3/16" solid rod with UV stabilized polyethylene Button insulators and stainless steel keepers.
Thousands of these type elements are in amateur and commercial service with NO failures! Booms are constructed of
6063-T832 aluminum alloy tubing with close-tolerance swaged joints. Other key electrical and mechanical components
are CNC machined for accuracy and durability. All hardware is stainless steel except the U-bolts. For uncompromising
performance and long term electrical / mechanical integrity, the 2M9SSB and 2M9FM are unmatched.