HF Ultimate Contest Triband Yagi Antenna 3B345HD

HF contest three bander 3B345HD is the top choice to win any contest. Be the first in pileups.

3 elements on 20m, 4el on 15m, and 5el on 10m will provide the necessary gain on all upper bands. Wide-spaced central elements can fit in thin antenna towers for antenna stacks.

HF Ultimate Contest Triband Yagi Antenna 3B345HD appearance

 

 

Electrical and Mechanical specifications and Radiation Pattern of the HF Ultimate Contest Triband Yagi Antenna 3B345HD

Electrical Specifications of the 3B345 HF antenna on the 20m:

Frequency range: 14-14.35 MHz
Free Space Forward Gain: 7 dBi
Front-to-back Ratio: 22 dB
-3 dB Horizontal Beamwidth: 66.1°
Maximum SWR at any frequency: 1.2

HF Ultimate Contest 3Band Antenna 3B345HD 20m Azimuth Radiation Pattern:

 

 

Electrical Specifications of the 3B345 HF antenna on the 15m:

Frequency range: 21-21.45 MHz
Free Space Forward Gain: 8.9 dBi
Front-to-back Ratio: 19 dB
-3 dB Horizontal Beamwidth: 60.3°
Maximum SWR at any frequency: 1.3

HF Ultimate Contest Triband Yagi Antenna 3B345HD 15m Azimuth Radiation Pattern:

 

 

Electrical Specifications of the 3B345 HF antenna on the 10m:

Frequency range: 28-28.8 MHz
Free Space Forward Gain: 10.4 dBi
Front-to-back Ratio: 23 dB
-3 dB Horizontal Beamwidth: 51.8°
Maximum SWR at any frequency: 1.2

HF Ultimate Contest Triband Yagi 3B345HD 10m Azimuth Radiation Pattern:

 

 

Common Electrical characteristics of the HF Ultimate Contest Triband Yagi Antenna 3B345HD

Nominal Input Impedance: 50 Ohm
Maximum Power Input: More than 2500 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 3B345HD antenna

Boom Length: 8m
Boom Size: 80 x 80 mm
Longest Element: 11.5 m
Number of Elements: 12 Full-Size Elements
Turning Radius: 7 m
Surface Area: 1.2 m2
Mounting mast or tower diameter: 60 – 600 mm
Survival Wind Speed: 150 km/h
Weight: 75 kg

Two antenna stack:

20m band gain: 10.32 dBi
15m band gain: 12.14 dBi
10m band gain: 13.26 dBi

Stacking distance 10-12m. The above results are for 11m.

 

Pictures of the HF ultimate contest triband antenna 3B345HD and details:

HF Ultimate Triband Antenna 3B345HD Common Feed Line

 

 

HF Ultimate Triband Antenna 3B345HD Gain and Label

 

 

HF Ultimate Triband Yagi Antenna 3B345HD Bracket and Guy Rope Support View

 

 

3B345HD Bracket and Label View

 

HF Ultimate Contest 3Band Antenna 3B345HD View