FM3 SERIES
FM3 SERIES
CIRCULAR POLARIZED
MEDIUM POWER FM ANTENNAS
Product Specifications:
Frequency Range
Polarization
Power Rating
System Input
Circularity
VSWR
Bay Dimensions
88 – 108 MHz
Circular
3 kW per bay
1 5/8” or 3 1/8” EIA
± 2 dB Free Space
1.1:1 ± 200 kHz
H 38” / W 38.5 / D 19”
Features:
Full Wave Spaced
Electrical and Mechanical Specifications
•FULL POWER RATING. Rated at 3kW per bay with a
maximum of 15 kW for five bays or more.
•EXCELLENT CHOICE FOR MOST CLASS “A” STATIONS.
Provides superior performance for stereo and SCA operations
due to its high VSWR rating.
•RUGGED CONSTRUCTION. The antenna system is fabricated
from rugged, heavy wall copper and naval brass. All joints are
tig-welded.
•PRESSURIZED AND GROUNDED. The antenna system is
pressurized to the feed point of each bay and each bay is DC
grounded.
Half Wave Spaced
Electrical and Mechanical Specifications
•BEAM TILT AND/OR NULL FILL OPTIONAL. Custom vertical
patterns are available with center-fed arrays that have an even
number of bays.
•CUSTOM DIRECTIONAL PATTERNS. FM directional antennas
based on the customer’s mounting structure, with FCC filing
documentation, are available.
•WEATHERIZATION (OPTIONAL).
Radomes or electrical
deicers available for areas that experience periods of heavy icing
and/or snow conditions.
•STANDARD MOUNTING BRACKETS. Fits up to 4” tower leg
or pipe. Supplied with antenna.
•WARRANTY.
2-year limited warranty on
workmanship to the original purchaser.
defects and
Notes:
1. Power rating is based on 40 degrees C ambient. Degeneration occurs
above 2000 ft.
2. Antenna weight, windload, aperture, and dimensions are based on midband operation (98.1 MHz).
3. Antennas with 2 or more bays come with input fine-matcher.
4. Windload based on 50/33 psf.
5. SWR, Inc. maintains a continuous program of product improvement and
therefore reserves the right to change specifications without notice.
3/4 Wave Spaced
Electrical and Mechanical Specifications
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