|
|
|
|
|
Home Page | Manufacturers | Decibel Products | Dipoles | Quotation | Search | E-mail |
DB222 -
BROAD BAND ANTENNA, 3 or 6 dB GAIN, 137-174 and 220-222 MHz |
| This Popular antenna is
available with two folded dipoles, DB222, or with a single folded dipole,
DB220. Broad Response - Bandwidth allows antenna to perform efficiently on both transmit and receive. Flexible Array - Available with dipoles aligned collinearly for an offset pattern or with dipoles on the opposite sides of the mast for a circular pattern. Easy to change in the field. Weather 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. Easy Mount - DB365-OS Mounting Clamps are included for top mounting to the tower. Ordering Information - Use model number for correct frequency, add E for offset pattern, and specify termination if non-standard. Clamps for top mounting are supplied. For side mounting order DB5001 Side Mount Kit. For Dipole Stabilizer Kit order 12088 (two required). Order jumper cable separately, if desired. |
|
SPECIFICATIONS |
Electrical Data |
| Frequency Ranges - MHz** - A = 150-158, B = 158-166, C= 166-174, F = 137-143, JJ = 220-222 |
| Single dipole model DB220 frequency ranges - MHz - A = 146-153, B = 153.160, C = 160-167, D = 167-174 |
| Bandwidth (See above) VSWR 1.5 to 1 or less |
| Nominal impedance - ohms 50 Gain (over halfwave dipole) 3.0 Omni pattern - dB, 6.0 Offset pattern - dB |
| Maximum power input - watts 500 Vertical beamwidth (1/2 power points) 36� |
| 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. |
Mechanical Data |
| Mast (aluminum) - in. (mm) - 1.75
(44.45) with .062 to .125 (1.57 to 3.18) wall Radiating elements (aluminum) - in. (mm) - .5 (12.7) OD with .058 (1.47) wall Mounting clamps - Galvanized steel |
| Maximum exposed area (flat plate equivalent) - ft.sq (m.sq) - 1.6 (.149) |
| Lateral thrust at 100 mph (161 km/hr) - lbf
(N) - 64 (284.7) Wind rating:* Survival w/o ice - mph (km/hr) - 125 (201) Survival with .5" (12.7 mm) radial ice - mph (km/hr) - 90 (145) |
| Overall length (150-174 MHz) - in. (mm) - 127 (3226) |
| Net weight (w/clamps) - lbs (Kg) - 16 (7.26) Shipping weight (w/clamps) - lbs. (kg) - 30 (13.61) |
| Mounting clamps (DB365-OS) are supplied with the antenna. |
| *Top mounted antenna. Wind rating is greatly
increased when antenna is side mounted with appropriate side mount kit. **Note: The mechanical specs are degraded for antennas covering 137-150MHz band |
| Side Mounting - The following table shows the approximate gains of the DB222 and DB222E side mounted on triangular towers measuring 18" to 24" (457.2 to 609.6 mm) between legs. 0� azimuth is the direction the side mount arm points out from the tower. |
Antenna |
Azimuth |
|||
| 0� | 90� | 180� | 270� | |
| DB222 Omni | 4.0 dB | 5.5 dB | -3.0 dB | 5.5 dB |
| DB222E elements facing away from tower | 6.3 dB | 4.5 dB | -7.0 dB | 4.5 dB |
| DB222E elements facing toward tower | 3.0 dB | 5.0 dB | -1.0 dB | 5.0 dB |
|
WISCO International, Inc. -
MIAMI, FL U.S.A. Fax: (954) 370-3997 | E-mail: wiscointl@wiscointl.com |
