WISCO international (Sinclair- Antennas/ SY250, SY350)

SY250

The SY250 is a medium gain broadband yagi antenna. It has been specially designed to replace the 206 series where extra broadband operation is required and/or icing and hoarfrost conditions are prevalent.
The extremely wide bandwidth of the SY250 series makes it practical to stock these antennas for fast replacement use in any part of the 138-174 MHz band. Dual and quad arrays are available to meet your needs for higher gain, providing 9.5 and 12.0 dB gain respectively. The SY250EB is also available for end boom mounting.

SY350

The SY350 is a broadband medium gain yagi antenna specially developed to maintain its performance characters under severe icing or hoarfrost conditions typically encountered in coastal or mountain areas. Two or more antennas may be stacked for added gain.

Electrical		SY250	SY350
Frequency Range	MHz	138-174	406-512
Bandwidth 2.0:1 VSWR	MHz	36	406-480, 450-512
Polarization	dB	Vertical or Horizontal
Pattern		Directional
Nominal Gain	dBd	7
Horizontal Beamwidth (nom.) (half power points)	Deg	80
Vertical Beamwidth (nom.) (half power points)	Deg	60
Front to Back Ratio (typ.)		10
Power Rating	Watts	250
Lightning Protection		DC Ground
Termination		'N' Male

Mechanical		SY250	SY350
Height	in (mm)	80 (2,032)	28 (711)
Weight	lb (kg)	12 (5.4)	5 (2.3)
Rated Wind Velocity	mph (km/h)	100 (161)	150 (241)
Rated Wind Velocity with 0.5 in (12.7mm) radial ice	mph (km/h)	85 (137)
Horizontal Thrust at rated wind velocity and ice load	lb (kg)	87 (39.5)	24 (10.9)
Projected Area (flat plate equivalent)	ft� (m�)	1.45 (0.13)	0.22 (0.02)
Torsional Moment	ft� lb (N.m)	184 (249)	30 (41)
Mounting Information	Two clamps are provided to mount antenna on a 1.9 in (48.3 mm) to 2.38 in (60.3 mm) O.D support pipe