WISCO International (Decibel Products / Fiberglass

These are UHF omnidirectional antennas enclosed in 2" (50.8 mm) OD Horizon Blue^TM radomes made of Minimum-Tip-Deflection� (MTD�) fiberglass, Decibel's radome material that resists extremely high winds with very little tip deflection.

Full UHF Coverage - Four models with bandwidths up to 32 MHz fulfill spectrum needs for UHF conventional, paging and radiotelephone communications.
Sturdy Construction - In addition to the Minimum-Tip-Deflection fiberglass radome, each antenna has a 9" (228.6 mm) weather-resistant, gold iridited mast made of strong 6061-T6 aluminum alloy.
Very Rugged - The antennas resists winds to 200 mph (322 kph) with .5" (12.7 mm) of icing.
Engineered to Last - All metals used in radiator, feed and matching systems are copper or brass, which minimizes galvanic reaction and reduces intermodulation.
Lightning Resistant - A large diameter conductor extends from top to bottom to provide ground to the tower.
Moisture Resistant - The bottom cap has a moisture-sealed bulkhead N-Female connector, and a removable drain plug is located at each end of the antenna.
Ready to Install - DB5091-3-No-Torsion Clamp and Vapor-Wrap� are provided.

Ordering Information - Order DB630 for unity gain and DB633 for 3 dBd gain. Use model number for correct frequency. Clamps are included. Order jumper cable separately, if desired.

Electrical Data
	DB630	DB633
Frequency Ranges - MHz	See table	See table
Bandwidth - MHz Gain - dBd	See table See table	Unity 3
Beamwidth "E" Plane (half power) Beamwidth "H" Plane (half power) Maximum power input - watts	80� Omni 500	35� Omni 500
VSWR Lightning protection	1:5 to l or better Direct ground	1:5 to l or better Direct ground
Termination	Type N-Female (fixed)	Type N-Female (fixed)

Mechanical Data
	DB630	DB633
Lateral Thrust at 100 mph (161 km/hr) - lbf (N)	13.6 (60.5)	19.6 (87.2)
Radome OD - in. (mm) Radome ID - in. (mm) Radome length - ft. (m)	2 (50.8) l.75 (44.45) 2.l7 (.66)	2 (50.8) l.75 (44.45) 3.5 (l.07)
Mast OD - in (mm) Mast length - in. (mm)	2.5 (63.5) 9 (22.86)	2.5 (63.5) 9 (228.6)
Maximum exposed area (flat plate equivalent) - ft� (m�)	.34 (.03)	.49 (.05)
Wind rating: Survival w/o ice - mph (km/hr) Survival with .5" (12.7 mm) radial ice - mph (km/hr)	225 (362.0) 200 (321.8)	225 (362.0) 200 (321.8)
Tip deflection at 100 mph (161 km/hr) Bending moment 1" (25.4 mm) below top of mast at 100 mph (161 km/hr) - ft. lb. (N/m)	0.1� 11.2 (15.2)	0.4� 28.5 (38.7)
Radome Radiators Support pipe	Fiberglass Brass 6061-T6 Aluminum	Fiberglass Brass 6061-T6 Aluminum
Net weight - lbs. (kg) Shipping weight - lbs. (kg)	6 (2.27) 16 (7.26)	8 (3.63) 19 (8.62)
Clamps (galvanized steel)	DB365-OS	DB365-OS

Frequency Ranges Available - MHz
DB630/633-A DB630/633-B DB630/633-C DB630/633-D	406-436 425-455 450-482 480-512