WISCO International

Home Page | Manufacturers | Decibel Products | Dipoles | Quotation | Search | E-mail

DB224- BROAD BAND ANTENNA, 6 OR 9 Db GAIN, 138-174 AND 220-222 MHz

This popular antenna is available with four folded dipoles for high gain and broad bandwidth.


  • Broad Response - 10 MHz bandwidth provides optimum performance in single or multi-frequency systems, on both transmit and receive.
  • Circular Pattern - DB224 has four elements positioned evenly, every 90 degrees around the mast, for omni pattern.
  • Offset pattern - DB224E comes with four elements aligned collinearly on the same side of the mast for maximum directional gain.
  • Dual Version - Two antennas on the same mast are fed and operated separately, providing 3 dB omni or 6 dB directional patterns.
  • Two-Piece Mast - For ease of shipment and handling, the mast is made in two sections. A unique center splice assures proper alignment.
  • Lightning-Resistant - The radiators operate at DC ground, and the aluminum mast with its pointed cap provides a low resistant discharge path to the tower or ground system.
  • For Air Shipment - Model DB224X has a shortened mast, 124" (3150 mm).

Ordering Information -Use model number for correct frequency and specify termination if non-standard. Add E for offset pattern, S for dual omni or ES for dual offset pattern. DB365-OS Mounting Clamps are included. For side mounting order DB5001 Side Mount Kit. For Stabilizer Kit, order 12088 (4 required). For shortened mast, order DB224X. Order jumper cable separately, if desired.

DB224E

SPECIFICATIONS

Mechanical Data

Mast - upper (aluminum - in. (mm)
1.75 (44.45) OD with .062 to .125 (1.57 to 3.18) wall
Mast - lower (aluminum) - in. (mm)
2 (50.8) OD with .125 to .187 (3.18 to 4.75) wall
Radiating elements (aluminum) - in. (mm)
.5 (12.7) OD with .058 (1.47) wall
Maximum exposed area (flat plate equivalent) - ft.sq (m.sq) 3.15 (.292)
Lateral thrust at 100mph (161 km/hr) - lbf (N) 126 (560.5)
Wind rating: *
Survival w/o ice - mph (km/hr) 100 (161)
Survival with .5" (12.7 mm) radial ice - mph (km/hr) 74 (119)
Overall length (150-174 MHz) - in. (mm) 255 (6477)
Shipping length - in. (mm) 148 (3759)
Net weight (w/clamps) - lbs. (kg) 32 (14.51)
Shipping weight (w/clamps) - lbs. (kg) 48 (21.77)
Mounting clamps (Galv. steel) DB365-OS
*Top mounted antenna. Wind rating greatly increased when antenna is side mounted

Electrical Data

Frequency Ranges * - MHz A= 150-160, B= 155-165, C= 164-174,
E= 138-150, J= 276-285, JJ= 220-222
Bandwidth (150-174 MHz) - MHz 10
VSWR 1.5 to 1 or less
Nominal impedance - ohms 50
Gain (over half-wave dipole) 6.0 Omni pattern-dB, 9.0 Offset pattern-dB
Maximum power input - watts 500 Vertical beamwidth (1/2 power points) 16�
Decoupling between antennas (split models) - dB 35 minimum
Lightning protection Direct ground
Standard Termination: Captive Type N-Male attached to end of flexible lead. Other fittings can be supplied on special order. If UHF connector is required, an adapter is provided.
* Special frequencies are available, contact us for details.
WISCO International, Inc. - MIAMI, FL U.S.A.
Fax: (954) 370-3997 | E-mail: wiscointl@wiscointl.com