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DIRECTIONAL YAGI ANTENNAS 10 dB GAIN, 406-512 MHz
Models DB436 - DB437 - DB438
DB436 These three heavy duty Yagis give highly directional coverage and good front-to-back ratios.
  • Sturdy Construction - All three are made of high strength welded aluminum alloys. DB437 and DB438 have a gold anodized finish. On DB438 the connector is an N-Female boom mounted, while the others have N-Male pigtails.
  • Stacked Arrays - Two antennas provide 13 dB gain and four antennas 16 dB gain. Polarization can be vertical or horizontal, and the antennas can be mounted side-by-side or vertically. One wavelength of vertical separation is recommended.
  • Bi-directional Pattern - Antennas can be mounted on opposite sides of the tower if desired.
  • Lightning Resistant - Protection provided by direct ground.
  • UPS Shippable
    Ordering Information: Use model number for correct frequency and specify termination if non-standard. Mounting clamps are included. Order DB5009 for side-by-side mounting, DB5018 for quad. Other size clamps can be special ordered.
    Example: DB436-A for 406-420 MHz.
    Order jumper cable separately, if desired.
DB438
DB437

SPECIFICATIONS
Gain Order Order
10 dB 1 ea. DB436, DB437 or 1 ea. DB438 Antenna
13 dB 2 ea. DB436
1 ea. 14436/7-2 Dual Harness 		2 ea. DB438, DB437 or
1 ea. 14438-2 Dual Harness
16 dB 4 ea. DB436
2 ea. 14436/7-2 Dual Harness
1 ea. 14436/7-4 Quad Harness 		4 ea. DB438, DB437 or
1 ea. 15438-4 complete on piece
Quad Harness

Electrical Data

Frequency Ranges - MHz A = 406-420, B = 425-445, C = 450-470,
D = 470-494, E = 488-512
Bandwidth
VSWR 		Same as above
1.5 to 1 or less
Nominal Impedance - ohms
Gain (over half-wave dipole) - dB 		50
10
Maximum power input - watts
Vertical beamwidth (half power)
Horizontal beamwidth (half power) 		250
44� 60�
Front-to-back ratio - dB
Lightning protection 		16
Direct ground
Standard Termination: Captive Type N-Female on DB438. DB436 has Type N-Male; DB437 has Type N-Female. If UHF connector is required, an adapter is provided.

Mechanical Data

Support Boom - (aluminum) - in. (mm)
Elements
Mounting brackets 		1 (25.4) OD with .083 (2.108) wall
Aluminum
Galvanized steel
Maximum exposed area (flat plate equivalent) - ft� (m�)


Lateral thrust at 100 mph (161 km/hr) - lbf (N) 		.45 (.042) single
.90 (.084)-2
1.8 (.167)-4
18 (80.7) single
36 (160.1)-2
72 (320.3)-4
Wind rating:*
Survival without ice - mph(km/hr)
Survival with .5" (12.7 mm) radial ice - mph (km/hr)
125 (201)
90 (145)
Dimensions (HxL) - in. (mm)

 14.5 (368.3) x 35 (889) single
40 (101.6) x 35 (889)-2
90 (2,286) x 35 (889)-4
Net weight - lbs. (kg)

7 (3.18) single
15 (6.8)-2
30 (13.61)-4
Shipping weight - lbs. (kg)

 9 (4.08) single
18 (8.16)-2
40 (18.14)-4
Mounting clamps Stainless steel V-bolts
WISCO International, Inc. - MIAMI, FL U.S.A.
Fax: (954) 370-3997 | E-mail: wiscointl@wiscointl.com

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