F-3647-HDBTM Heavy Duty

Frequency Range: 138-174, 406-512 MHz

Gain: 2.0-2.5dBd

The F-3647-HDBTM is a heavy duty wideband dual antenna with an 871F-70 on the base and a 771-70 on the top. The antenna offers for the 871F-70 & 771-70 a choice of radiation patterns that are determined by the dipole-to-mast spacing. The F-3647-HDBTM has an internal cabling and is not field adjustable.

The 871F-70 & 771-70 antenna is offered in a ¼, 3/8, or ½ wave pattern spacing versions. The antenna can be black anodized. Heavy Duty version of the antenna is also available.

DOWNLOAD PDF DOWNLOAD DIGITAL PATTERNS

Description

The 871F-70 & 771-70 antenna is offered in a ¼, 3/8, or ½ wave pattern spacing versions. The antenna can be black anodized. Heavy Duty version of the antenna is also available.

Additional information

Frequency Range, MHz	138-174, 406-512
Nominal Gain, dBd	2.0-2.5
Bandwidth: 1.5:1 VSWR, MHz	36 (871F-70), 106 (771-70)
Number of Dipoles	1 (871F-70), 1 (771-70)
Polarization	Vertical
Pattern	Offset/Bidirectional
Power Rating, Watts	200 (871F-70), 150 (771-70)
Nominal Impedance, Ohms	50
Lightning Protection	DC Ground
Standard Termination	Type N Male, other connectors available upon request
Temperature range	-40 to +60 C˚
Length, in (mm)	126 (3200)
Width, in (mm)	43 (1092)
Weight, lbs (kg)	32 (14.5)
Rated Wind Velocity, No Ice, mph (km/h)	170 (274)
Rated Wind Velocity, 0.5” (13mm) ice, mph (km/h)	135 (217)
Lateral Thrust @ 100 mph, wind, lbs. (N)	95 (424)
Bending Moment @ top clamp: 100 mph, ft.*lb (N.M)	248 (336)
Projected Area, ft² (m²)	3.5 (0.33)
Mounting Information Mast O.D., in. (mm)	2.88 ( 0.73)