High-performance 3-Band Super Yagi antenna 3B-457HD

Put on the tower and win the HF contests. The world’s best HF 3-Band antenna 3B-457HD with excellent gain, front to back, and low SWR on all three upper HF bands. 20m 15m and 10m. The 16-element 3-band antenna box comes with an antenna, a balun with a connector, and a bracket. Just put everything together and have fun! This Ham Radio antenna, like all of our antennas, was created using specialized full-3D EM modeling software with accuracy which is impossible to see with poor EZNec and similar programs.

The antenna has 16 Full-Size elements. 4 elements on a 20-meter, 5 elements on a 15-meter, and 7 elements on a 10-meter band.

The 3B-457HD antenna uses a common feed line. Input power is limited by the feed line only. Wind survival speed 150 km/h.

Assembled and tested before shipping. There is no exception. All our Ham Radio antennas are pre-tuned. Once the antenna is up in the air, you should expect extremely good SWR across the whole designed range, true gain, and F/B as given in the table. You have nothing to tune, nothing to measure. Just put number to number and enjoy the Ham Radio hobby.

 

 

This antenna is “the ONE” for DX hunting. The wide band antenna is designed for 20-meter, 15-meter, and 10-meter bands.

Everything is labeled, just put number to number.

 

 

Electrical and Mechanical specifications and Radiation Pattern of the world’s best HF 3-band antenna on the 11.4-meter boom – 3B-457HD

Electrical Specifications on the 20-meter:

Frequency range: 14-14.35 MHz
Free Space Forward Gain: 9.4 dBi
Front-to-back Ratio: 20 dB
-3 dB Horizontal Beamwidth: 58.3°
Maximum SWR at any frequency: 1.2

 

Azimuth radiation pattern of 20-meter band:

 

Electrical Specifications on the 15-meter band:

Frequency range: 21-21.45 MHz
Free Space Forward Gain: 10.6 dBi
Front-to-back Ratio: 27 dB
-3 dB Horizontal Beamwidth: 54.4°
Maximum SWR at any frequency: 1.2

 

Azimuth radiation pattern of 15m band:

 

 

Electrical Specifications on the 10-meter band:

Frequency range: 28-29 MHz
Free Space Forward Gain: 11.6 dBi
Front-to-back Ratio: 26 dB
-3 dB Horizontal Beamwidth: 47.1°
Maximum SWR at any frequency: 1.2

 

Azimuth radiation pattern of 10m band:

 

 

Common Electrical characteristics of the World Best HF 3-Band Antenna 3B-457HD antenna

Nominal Input Impedance: 50 Ohm
Maximum Power Input: More than 1500 W (more by request)
Matching Method: Direct feed through a current balun. One cable for all three bands.
Connector: Silver Plated SO239

Common Mechanical characteristics of the 3B-457HD antenna

Boom Length: 11.4 meter
Boom Size: 80 x 80 mm
Longest Element: 11.5 m
Number of Elements: 16 Full-Size Elements
Turning Radius: 8 m
Surface Area: 1.5 m2
Mounting mast or tower diameter: 60 – 600 mm
Survival Wind Speed: 150 km/h
Weight: 106 kg

3B457HD antenna mounting on a rotary tower.

 

 

Other HF antennas

Take a look at all our HF antennas by clicking this link.

If you are interested in a shorter antenna, take a look at our 3-band 3B-222 antenna that has a boom length of just 3 meters and covers 20m, 15m, 10m, and the CB portion of the band!

For longer 3 Band antenna on a 6-meter boom click on the 3B-334HD antenna. Videos about 3B-222HD Antenna and 3B-334HD Antenna.

For more information, contact us via e-mail: info@antennas-amplifiers.com