WISCO International (Decibel Products

DB411 uses a 4-stack collinear array of folded dipole elements to provide high gain and constant performance over a broad offset horizontal pattern. Mounts to the top or side of a tower or structure.

Extremely Rugged - Resists wind to 125 mph (201 km/hr)
Broad Response - With 14 to 24 MHz bandwidth, this antenna is suitable for duplex operation.
Moisture Resistant - VAPOR-BLOC� cable harness provides weather protection and assures inphase signal distribution to all elements.
Key Applications - Ideal for mobile systems requiring additional gain over a sector or along a coast or area with geographical boundaries.

Sturdy Construction - Mast and elements are made of high strength aluminum alloys.
Lightning Resistant - Radiators operate at DC ground and the aluminum mast with its pointed top provides a low resistance discharge path to the tower or ground system.
Ordering Information - Use model number for correct frequency and specify termination if non-standard. DB365-OS Clamps are included. Order DB5012 Side Mount Kit if needed. Other size clamps can be special ordered. Example: DB411-B.

Electrical Data
Frequency Ranges - MHz	A = 406-420 B = 450-470 C = 470-488 D = 488-512
Bandwidth VSWR	Same as above 1.5 to 1 or less
Nominal Impedance - ohms Gain (over half-wave dipole) - dB	50 9
Rated power input - watts Vertical beamwidth (half power)	250 14�
Lightning protection	Direct ground
Standard Termination: Captive Type N-Male attached to end of flexible lead. Other fittings are available on special order. N-Female is available. If UHF connector is required, an adaptor is provided.

Mechanical Data
Mast - (aluminum) - in. (mm) Radiating elements (aluminum) - in. (mm)	1.75 (44.45) OD with .062 (1.575) to .125 (3.175) wall .375 (9.525) OD with 0.58 (1.473) wall
Maximum exposed area (flat plate equivalent) - ft� (m�)	1.5 (.139)
Wind rating:* Survival without ice - mph(km/hr) Survival with .5" (12.7 mm) radial ice - mph (km/hr)	over 125 (201) 112 (180)
Lateral Thrust at 100 mph (161 km/hr) - lbf (N) Bending moment at top clamp at 100 mph (161 km/hr) - ft. lbs. (kg m)	60 (266.9) 170 (23.53)
Overall Length (450-470 MHz) - ft. (m)	9.42 (2.87)
Net weight (w/clamps) - lbs. (kg) Shipping weight (w/clamps) - lbs. (kg)	25 (11.34) 27 (12.25)
Mounting clamps (Galvanized Steel)	DB365-OS

*Antenna mounted at top of tower. Rating is substantially increased when antenna is side mounted.
NOTE: The mechanical specifications are slightly degraded for antennas covering the 406-420 MHz band.