WISCO International (Decibel Products

With an array of eight dual dipole elements, DB420 provides high gain and constant performance across a broad omni or elliptical pattern. Mounts to top or side of a tower or structure.
Rugged - Resists wind to 100 mph (161 km/hr).
Broad Response - With 14 to 24 MHz bandwidth, this antenna gives optimum performance in single or multi-frequency systems.

Moisture Resistant - VAPOR-BLOC� cable harness provides weather protection and assures inphase signal distribution to all elements.
Circular Pattern - DB420 has dual dipoles positioned at 90 degree angles from each other.
Offset Pattern - DB420L has all dual dipoles mounted in line, collinearly, on the mast.
Duals and Quads - Two or four antennas can operate on the same mast with any combination of circular and elliptical patterns, each with a separate feed line.
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. Order the DB420 Omni, DB420L elliptical, DB420D* dual omni, DB420Q quad omni and DB420QL quad elliptical. DB365-OS Clamps are included. Order DB5012 Side Mount Kit if needed. Other size clamps can be special ordered. Example: DB420-B or DB420L-B for 450-470 MHz range. Order jumper cable separately, if desired.
*NOTE: DB420D has 6.6 or 7.8 dB gain for each antenna, 406-512 MHz

Electrical Data
Frequency Ranges - MHz	A = 406-420 B = 450-470 C = 470-488 D = 488-512
Bandwidth - MHz VSWR	Same as above 1.5 to 1 or less
Nominal impedance - ohms Gain (over half-wave dipole) - dB	50 9.2 or 10.4
Maximum power input - watts Vertical beamwidth (half power)	250 7�
Decoupling between antennas (dual and quad models) - dB Lightning protection	30 minimum 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 - upper (aluminum) - in. (mm) Mast - lower (aluminum) - in. (mm) Radiating elements (aluminum) - in. (mm)	1.75 (44.45) OD with .0625 to .125 (1.59 to 3.18) wall 2 (50.8) OD with .125 to .25 (3.18 to 6.35) wall .375 (9.53) OD with .058 (1.47) wall
Maximum exposed area (flat plate equivalent) - ft� (m�)	3.33 (.309)
Wind rating:* Survival without ice - mph(km/hr) Survival with .5" (12.7 mm) radial ice - mph (km/hr)	100 (161) 70 (112.65)
Lateral Thrust at 100 mph (161 km/hr) - lbf (N)	133 (592.5)
Overall length (450-470 MHz) - ft. (m)	18.08 (5.51)
Net weight (w/clamps) - lbs. (kg) Shipping weight (w/clamps) - lbs. (kg)	34 (15.42) 58 (26.31)
Mounting clamps (Galvanized Steel)	DB365-OS