GP4 HF Trap Vertical Antenna 4 Band 7 14 21 29MHz, Shortwave Ground Plane Radiator 1000W PEP, UHF Female Connector, for Amateur Radio DXing and Open Air Urban Setup
【Auto Resonating Trap Filters】: Features precision machined notch filters for 40m 20m 15m 10m amateur bands - Eliminates manual coil swapping during frequency changes - Enables seamless multi band communication directly from your transceiver
【Compact Vertical Footprint】: Designed with an upright form factor compared to long horizontal wires - Requires minimal installation area - Provides an effective base station solution for tight urban backyards flat rooftops or open sky balconies
【High Power Wind Resistance】: Constructed from a 5 lbs aluminum mast capable of handling 1000W PEP - Offers reliable structural strength against severe weather - Maintains stable signal transmission during intense DX contests or daily operations
【Radial Wire SWR Tuning】: Operates as a quarter wave system requiring user supplied ground wires - Attains optimal impedance matching by trimming radial lengths - Protects the main radiator factory calibration by avoiding tube cutting
【Standard Fastening & Optional Rivets】 The pre-drilled holes on the tube joints are for alignment only. For normal operation, securing the joints with the included screws and nuts is completely sufficient and provides a highly reliable hold. As a bonus for extreme weather setups, the package also includes pop rivets for permanent reinforcement (Note: A pop rivet gun is required for this optional method and is not included)
Description
WOOKLEA GP4 TRAP VERTICAL ANTENNA: MAXIMUM DX IN MINIMUM SPACE Don't let urban living or restricted yard space restrict your global communications. The WOOKLEA GP4 is a heavy-duty, space-saving HF base station antenna designed for dedicated ham operators and survivalists who need reliable 4-band coverage (7/14/21/29MHz) without the massive footprint of horizontal wire dipoles. ADVANCED TRAP TECHNOLOGY The secret to its sleek profile is the highly machined notch filters integrated into the vertical aluminum mast. These traps automatically block or pass specific RF frequencies, allowing the antenna to physically remain at 18.5 ft while electrically resonating on the 40m, 20m, 15m, and 10m bands. THE URBAN MOUNTING ADVANTAGE While horizontal antennas require over 60 ft of clear aerial space, the GP4 vertical radiator focuses its footprint on the ground. Install it on a flat rooftop, a compact backyard, or securely mount it on an open-sky apartment balcony bracket (minimum 18.5 ft vertical clearance required). HEAVY-DUTY 1000W PEP PERFORMANCE Despite its manageable 5 lbs weight, this antenna is a beast. It easily handles 1000W PEP amplifiers and is structurally rated for Grade 12 wind resistance to survive severe storms and field day conditions. CRITICAL INSTALLATION & TUNING NOTES: RADIALS REQUIRED: This ground plane antenna will not work without radial wires (not included). TUNING THE SWR: Achieve a perfect