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DB408 BROAD BAND ANTENNA 6.6 or 7.8 dB GAIN, 406-512 MHz

Two DB404 antennas are combined to form the DB408 antenna with its 4 stack collinear array of dual dipoles.
Broad Response - With 14 to 24 MHz bandwidth, DB408 is highly suitable for duplex operation.
Moisture Resistant - VAPOR-BLOC� cable harness provides weather protection and assures in phase signal distribution to all elements.
Circular Pattern - DB 408 has dual dipoles positioned at 90 degree angles from each other.
Offset Pattern - DB408L has all dual dipoles in line, collinearly, on the mast.
Side Mounting - Either model can be side mounted, resulting in significantly different patterns.
Dual Models - Two DB404 antennas on the same mast function independently.
Field Changeable - Patterns can be adjusted with ordinary hand tools.
Lightning Resistant - The radiators operate at DC ground and the aluminum mast with its pointed cap 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 DB408 for omni pattern, DB408L for offset pattern, DB408D* for dual antennas with omni patterns and DB408DL for dual antennas with offset patterns. DB365-OS Clamps are included. Order DB5012 Side Mount Kit if needed. Other size clamps can be special ordered.
Examples: DB408-B, DB408L-B for 450-470 MHz range. Order jumper cable separately, if desired

DB 408


Electrical Data
Frequency Ranges - MHz A = 406-420 B = 450-470
C = 470-488 D = 488-512
Bandwidth - MHz
Nominal Impedance - ohms
Same as above
1.5 to 1 or less
Gain (over half-wave dipole)
Rated power input - watts
6.6 or 7.8
Vertical beamwidth (half power) 14�
Decoupling between antennas (dual) - 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 - (aluminum) - in. (mm)

Radiating elements (aluminum) - in. (mm)
1.75 (44.45) OD
with .0625 (1.588) to .125 (3.175) wall
.375 (9.525) OD with 0.58 (1.473) wall
Maximum exposed area (flat plate equivalent) - ft� (m�)
1.9 (.177)
Wind rating:*
Survival without ice - mph(km/hr)
Survival with .5" (12.7 mm) radial ice - mph (km/hr)

over 125 (201)
85 (137)
Lateral Thrust at 100 mph (161 km/hr) - lbf (N) 76 (338)
Bending moment at top clamp at
100 mph (161 km/hr) - ft. lbs. (kg m)

250 (34.6)
Overall Length - ft. (m)
Net weight (w/clamps) - lbs. (kg)
Shipping weight (w/clamps) - lbs. (kg)
9.42 (2.87)
17 (7.71)
29 (13.15)
Mounting clamps (Galvanized Steel) DB365-OS

*Top mounted antenna: Wind rating is greatly increased when antenna is side mounted.
NOTE: The mechanical specifications are slightly degraded for the antenna covering the 120-150 MHz band.

WISCO International, Inc. - MIAMI, FL U.S.A.
Fax: (954) 370-3997 | E-mail: wiscointl@wiscointl.com

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