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DB636 DB638 OMNI ANTENNAS 6 or 8 dB GAIN, 406-512 MHz |
![]() DB636 with 6 dBd gain and DB638 with 8 dBd gain are UHF omnidirectional antennas. Radiators are enclosed in a 3" (76.2 mm) OD Horizon BlueTM radome made of Minimum-Tip-Deflection� (MTD�) fiberglass, Decibel's heavy duty radome material that resists high winds with very little tip deflection.
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SPECIFICATIONS |
Electrical Data |
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DB636 | DB638 | |
Frequency Range - MHz | 406-512 | 406-512 |
Bandwidth Gain (maximum) - dBd |
See table 6 |
See table 8 |
Beamwidth "E" Plane
(half power) Beamwidth "H" Plane (half power) |
20� Omni |
10� Omni |
Maximum power input - watts Input impedance - ohms VSWR |
500 50 1:5 to 1 |
500 50 1:5 to 1 |
Lightning protection Termination |
Direct ground Type N-Female (fixed) |
Direct ground Type N-Female (fixed) |
Mechanical Data |
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DB636 | DB638 | |
Lateral thrust at 100 mph (161 km/hr) - lbf (N) | 64.4 (286.5) | 108 (480.4) |
Radome OD - in. (mm) Radome ID - in. (mm) Radome length - ft. (m) |
3 (76.2) 2.5 (63.5) 7.8 (2.39) |
3 (76.2) 2.5 (63.5) 14.4 (4.39) |
Mast OD - in. (mm) Mast length - in. (mm) |
2.5 (63.5) 26 (660.4) |
2.5 (63.5) 26 (660.4) |
Maximum exposed area (flat plate equivalent) ft� (m�) | 1.61 (.15) | 2.70 (.25) |
Wind rating: Survival without ice - mph (km/hr) Survival with .5" (12.7 mm) radial ice - mph (km/hr) |
225 (362.0) 200 (321.8) |
173.2 (278.8) 150.0 (241.4) |
Tip deflection at 100 mph (161
km/hr) Bending moment 1" (25.4 mm) below top of mast at 100 mph (161 km/hr) - ft./lbs (N/m) |
1.1� 210.0 (284.7) |
6.6� 700.8 (950.3) |
Radome Radiators Support pipe |
Fiberglass Brass 6061-T6 Aluminum |
Fiberglass Brass 6061-T6 Aluminum |
Net weight - lbs. (kg) Shipping weight - lbs. (kg) |
30 (13.61) 40 (18.14) |
40 (18.14) 85 (38.55) |
Clamps (galvanized steel)* | DB365-OS | DB365-OS |
*Shipping weight = 10 lbs. (4.54 kg). |
Frequency Ranges Available - MHz |
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DB636/638-A | 406-436 |
DB636/638-B | 425-455 |
DB636/638-C | 450-482 |
DB636/638-D | 480-51 |
WISCO International, Inc. -
MIAMI, FL U.S.A. Fax: (954) 370-3997 | E-mail: wiscointl@wiscointl.com |
Home Page | Manufacturers | Decibel Products | Fiberglass | Quotation | Search | E-mail |