Cushcraft A-4S

A4S Four Element Beam - 10, 15 & 20 Meters

A4S is the true, high performance tribander. Precisely tuned high-power traps, carefully selected element lengths, and proper spacing combine to make the A4S the preferred antenna for your HF work! This is the premium antenna with all the features that you want.

High gain, low SWR, and wide bandwidth keep the contacts coming in. All U-bolts, clamps and hardware are stainless steel. A4S has pinned boom sections and formed aluminum brackets to keep elements straight in all conditions.

Key Specifications

• Frequency Ranges 28, 21, 14
• Forward Gain, dBd 8.9
• Front to Back Ratio, dB 25
• 2:1 Bandwidth KHz >500
• Power Rating, Watts PEP 2000
• 3 dB Beam Width, Deg. E Plane 58
• Boom Length 18(5.48)
• Boom Diameter, In (cm) 2 (5.10)
• Longest Element, ft (m) 32 (9.75)
• Element Center Dia, In (cm) 1.25 (3.18)
• Turning Radius, ft (m) 18.4 (5.49)
• Mast Size Range, In (cm) 1.25-2 (3.18-5.08)
• Wind Load, ft2 (m2) 5.50 (0.51)
• Weight, lb (kg) 37 (16.8)

Our solid construction keeps the A4S on the tower! Add 40 meters withA-744 kit.