Engineering High Performance Antennas
KV4B-MONSTER
18 ELEMENTS QUAD BAND YAGI 10/15/20/40m, DUAL FEED
The KV4B-MONSTER is the result of combining two high-performance KV ANTENAS designs, originally developed to meet the needs of the most demanding DX and CONTEST stations. It combines, in a single structure, the efficiency of the KV101520-CONTEST (10/15/20m) with the robustness and performance of the KV240-CONTEST (40m, 85% size), creating a quad-band Yagi antenna unique in Latin America.
More than just a new antenna, the KV4B-MONSTER represents a new level of engineering applied to amateur radio.
Some features of the KV4B-MONSTER:
• 3” square tube gondola with reinforced steel cable truss;
• Central plate with 8mm thick aluminum sheet and U-clamps for fixing to masts up to 2.1/2” inches;
• Aluminum profiles with UV-resistant STAUFF polypropylene clamps to fix the elements to the gondola;
• Pre-assembled support system;
• Dual feed: Feed busbar for 10/15/20m and independent feed for 40m;
• Stainless steel and trivalent steel screws;
• Disassembles into pieces up to 220 centimeters to enable low-cost transport;
• Extended service life;
• 180cm central spacing for installation in the middle of the tower or towers with elevator;
• Element distribution:
7 elements for 10m
5 elements for 15m
4 elements for 20m
2 elements for 40m (85% size)
Engineering Concept:
The KV4B-MONSTER was conceived from the outset to operate as an integrated system, not as a simple superposition of antennas.
The entire project involves:
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Advanced electromagnetic modeling
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Specific structural calculations for combined loads
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Carefully studied spacing and positioning to minimize unwanted band interactions
High-Level Mechanical Structure:
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3” square tube gondola reinforced with truss and steel cable
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High-thickness aluminum structural plates
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Large-diameter aluminum elements
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Stainless steel fasteners and UV-resistant industrial clamps
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Modular design, facilitating transport, assembly, and maintenance
The KV4B-MONSTER was designed for robust towers and stations that require high reliability, even under harsh natural conditions.
TECHNICAL SPECIFICATIONS BY BAND:
10 METERS BAND:
Gain: 16.2 dBi
F/B: 28.00 dB
Bandwidth (SWR < 1.5:1): 800Khz
Active elements: 7
15 METERS BAND:
Gain: 15.3 dBi
F/B: 26 dB
Bandwidth (SWR < 1.5:1): 450Khz
Active elements: 5
20 METERS BAND:
Gain: 14.6 dBi
F/B: 20 dB
Bandwidth (SWR < 1.5:1): 350Khz
Active elements: 4
40 METERS BAND:
Gain: 10.5 dBi
F/B: 23.00 dB
Bandwidth (SWR < 1.6:1): 300Khz
Active elements: 2
GENERAL TECHNICAL SPECIFICATIONS:
Max. Power: 4KW PEP
Impedance: 50ohms
Boom Length: 11.50m
Largest Element: 16.20m
Turning Radius: 9.00m
Weight: 98Kg
Wind area: 2.24m²
Wind survival: 140 km/h
COMMERCIAL CONDITIONS:
Price and delivery time available upon request.
