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DB 220 - BROAD BAND ANTENNA, 3 or 6 dB GAIN, 137-174 and 220-222 MHz
DB220
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.

DB220

SPECIFICATIONS

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

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.
 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

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