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DB420 BROAD BAND ANTENNA 9.2 or 10.4 dB GAIN, 406-512 MHz

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

DB 420


Electrical Data
Frequency Ranges - MHz A = 406-420 B = 450-470
C = 470-488 D = 488-512
Bandwidth - MHz
Same as above
1.5 to 1 or less
Nominal impedance - ohms
Gain (over half-wave dipole) - dB
9.2 or 10.4
Maximum power input - watts
Vertical beamwidth (half power)
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
*Top mounted antenna. Wind rating is greatly increased when antenna is side mounted with
appropriate side mount kit.
NOTE: The mechanical specifications are slightly degraded for the antenna covering
the 406-420 MHz band.
WISCO International, Inc. - MIAMI, FL U.S.A.
Fax: (954) 370-3997 | E-mail: wiscointl@wiscointl.com

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