Antennas Amplifiers/YU1CF - PA144-432-21-3B Dual Band 2m/70cm Yagi Antenna

The Antennas Amplifiers PA144-432-21-3B is a dual band directional Yagi antenna designed for operation on the 2 metre and 70 centimetre amateur radio bands, covering 144–146 MHz and 430–440 MHz.

This model combines two directional antennas on the same boom: one Yagi for 2m and another for 70cm, allowing both bands to be used with a compact and robust installation. The antenna uses 1 common connector, simplifying cabling and connection to the radio system, especially when used with VHF/UHF transceivers with a common antenna output or with a suitable duplexer.

With 7 elements on 2m and 14 elements on 70cm, this antenna provides good directional gain, strong front-to-back performance and suitable beamwidth for longer-distance communication. It is suitable for fixed stations, VHF/UHF DX, contests, satellite operation, repeater work, technical experiments and amateur radio use.

The antenna features an approximately 300 cm boom, 30 x 30 mm boom section, centre mounting and horizontal polarization. The included voltage balun helps provide correct antenna feeding and improved matching to the coaxial system.

Main features

• Dual band directional Yagi antenna
• Brand: Antennas Amplifiers / YU1CF
• Model: PA144-432-21-3B
• Supported bands: 2m and 70cm
• Frequency range: 144–146 MHz + 430–440 MHz
• Number of elements: 7 + 14
• Antenna type: directional Yagi
• Polarization: horizontal
• Number of connectors: 1
• Common connector for VHF/UHF
• Balun included: yes, voltage balun
• Indicated maximum power: 750 W
• Front-to-back ratio at 145 MHz: 28 dB
• Front-to-back ratio at 432 MHz: 23 dB
• Horizontal half-power beamwidth, -3 dB: 40° on 2m / 22° on 70cm
• Boom length: approx. 300 cm
• Boom size: 30 x 30 mm
• Antenna mounting: centre mounted
• Guying: not required
• Robust construction for outdoor installation

Recommended applications

• VHF/UHF amateur radio stations
• 144 MHz and 430 MHz communication
• 2m and 70cm DX operation
• VHF/UHF contests
• Satellite operation
• Fixed stations with antenna rotator
• Point-to-point communication
• Technical tests and propagation monitoring
• Installations requiring a directional dual band antenna

Important note

For best performance, the antenna should be installed on a suitable mast, using low-loss coaxial cable and good quality connectors. Always confirm that the transceiver or antenna system is compatible with 1 common connector for 2m/70cm. For radios with separate VHF and UHF antenna outputs, a suitable duplexer may be required.