9kW DeltaXtrm20 - The Ultimate Low Angle 20M DX Monoband Deltaloop

All our products are handmade, and fulfilment times may vary depending on order volume. Please allow 2–3 weeks for your order to be completed and shipped.

The DeltaXtrm20 is engineered as a no-compromise 20-meter monoband antenna, purpose-built for serious DX operators. With its full-wave 120° bottom-fed delta loop geometry, it delivers ultra-low takeoff angles from modest heights, outperforming traditional verticals without the complexity of ground radials.

Key Features

• Optimized for DX: No NVIS or short-skip performance; designed specifically for long-haul, low-angle contacts
• Full-wave 120° delta geometry, bottom-fed
• Mounting height: 6 meters AGL (top wire ~11m wide, 5m high)
• 9kW power rating, CCS
• Built with 35mm diameter, 2mm thick marine-grade aluminum sloping legs
• Top wire: dual-wire spaced at 4cm using dielectric spacers for stability
• Rigid 3mm RVS mounting plate with integrated 1:1 common-mode choke
• Included: ultra-low-loss 75 Ω monoband impedance transformer → direct 50 Ω feed, plug & play
• Mounts on a solid 6m mast, no guy wires needed (or use our optional BlastFrame for freestanding deployment)

Radiation Performance

• Takeoff angle: ~16° at 6m feedpoint height
• Gain vs Ground-mounted 1/4 wave vertical: +2 to +3 dB, no radial losses
• Gain vs Raised 1/4 wave vertical (6m high): +1 to +1.5 dB, similar angle, but better efficiency
• No ground loss or radial field needed
• Radiation is omnidirectional in azimuth, with slight shaping due to the triangle plane. It behaves largely like a vertical with slight lobes, not truly directional

Noise Considerations
Because the DeltaXtrm20 is vertically polarized and mounted above ground, it will pick up more common-mode (CM) noise than a ground-mounted vertical. However, the integrated 1:1 choke and clean loop geometry help suppress most noise coupling. Expect slightly higher background noise than a vertical, but significantly stronger signals on low-angle DX paths.

Installation

• Mounts on a solid 6m pole, no guying needed
• Optional support: BlastFrame A-frame base for portable/freestanding use
• No tuner, no radials, no grounding system needed
• Mount at 6m, connect your coax, and go

DeltaXtrm20: For operators who want maximum DX performance from modest height without the compromises of verticals or the complexity of directional beams.