4 el. 15/10m Yagi

15/10 meter 4 element beam Yagi (21-28 MHz).

No traps or relays, one single coaxial cable.
This design uses a Reflector-Driven element on 15m and a Driven element-Director on 10m.

Specifications

• Forward gain in free space 15/10m (dBi): 6.5/6.7

• F/B ratio 15/10m (dB): 12/17

• Active element 15/10m: 2/2

• Frequency coverage 15m (MHz): 21.000 - 21.450

• Frequency coverage 10m (MHz): 28.000 - 28.900

• Bandwidth @ 1.5 VSWR 15/10m (kHz): 750/700

• Feed impedance (ohms): 50

• Power handling (kW): 5

• Longest element (m)/(ft): 7.36/24.1

• Boom length: 3.50/11.5

• Turning radius (m)/(ft): 4/13.1

• Weight (kg)/(lb): 12/26.4

• Wind survival (km/h)/(mph): 130/80.8

• Standard Mast size (mm)/(inch): 50/2 (55/2.25 or 60/2.50 optional at no extra cost)

Greases supplied

2 kinds of grease are supplied with your antenna:

• Aluminum contact grease: Professional grease containing 30% aluminum particles, recommended for the assembly of aluminum antenna tubes. Prevents binding, corrosion and the formation of aluminum oxide, and allows easy dismantling of antennas after several years.

• Copper conductive grease: Professional conductive grease with a copper base, recommended for all hardware requiring a sound and lasting electrical contact. Prevents oxydisation, damp ingress, and limits chemical reaction between stainless steel and aluminum.

Balun or no Balun ?

• This antenna does not require any balun.

• To avoid having stray current on the braid of a coaxial cable (often the cause of RF and/or TVI/BCI), you can make your own 1:1 choke balun with coaxial cable. Explanations are provided with antenna assembly instructions. (See also our F.A.Q).