DB 304 BROAD BAND ANTENNA 6.1 or 6.7 dB GAIN, 150-174 MHz

A heavy duty, lightweight antenna, the DB304 uses a 4-stack collinear array of dual dipoles to provide broad bandwidth, high gain and circular or offset patterns. It mounts to the top or side of the tower.

• Broad Response - 10 MHz bandwidth provides optimum performance in single or multi-frequency systems.
• Moisture Resistant - VAPOR-BLOC� cable harness gives weather protection and insures inphase signal distribution to radiating elements.
• Circular Pattern - DB304 provides an omni pattern when two dual dipoles at the htop are aligned at a 90 degree angle from the two dipoles at the bottom.
• Offset Pattern - DB304L has all dual dipoles positioned in line, collinearly, along the mast, providing an offset pattern with maximum directional gain.
• Side Mounted - Either model can be side mounted, resulting in significantly Different patterns.
• Dual Models - Each antenna is isolated from the other by 30 dB, and each has a separate feed line terminating at the base. DB304D with two omnis provides a gain of 3.2 dB each, but with two elliptical pattern antennas, the gain is 3.8 dB each.
• 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.
• Two-Piece Mast - For ease of shipment and handling, the mast is made in two sections. A unique center splice assures proper alignment.
  
  Ordering Information - Use model number for correct frequency and specify termination if non-standard. Order DB304 for omni pattern, DB304L for offset pattern, DB304D for dual with omni patterns and DB304DL for dual with offset patterns. DB365-OS Clamps are included. Order DB5001 Side Mount Kit if needed. For Dipole Stabilizer Kit, order 12089 (four required). Other size clamps can be special ordered. Example: DB304-A for 150-160 MHz range.

Side Mounting
Typical pattern, antenna side mounted on a tower with an 18" to 24" (457.2 mm to 609.6 mm) face may be viewed for DB304 omni.

SPECIFICATIONS

A = 150-160 B = 155-165
C = 164-174

10
l.5 to 1 or less