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RF Guru
VerticalVortex3 — An active E-Probe for the LowBands — 1.5 MHz - 10 MHz
VerticalVortex3 — An active E-Probe for the LowBands — 1.5 MHz - 10 MHz
Regular price
€279,00 EUR
Regular price
Sale price
€279,00 EUR
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per
Tax included.
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Free Service
If you order coax together with terminations, we’ll pre-assemble the ends for free before shipping.
If you order coax together with terminations, we’ll pre-assemble the ends for free before shipping.
Handmade & Lead Time
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.
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.
Listen to our SDRs
Hear the VerticalVortex and our other antennas live on remote SDRs.
Related reading
VerticalVortex — Technical Overview
Comparison of Active RX Antennas
Clever Phasing — Why These Arrays
VerticalVortex — Technical Overview
Comparison of Active RX Antennas
Clever Phasing — Why These Arrays
Included
- VerticalVortex active receive head
- Mounting hardware
- Coax power injector (13.8 V)
- Short adapter lead to a common receiver input
Optional
- 6 m × 35 mm marine-grade aluminum pole + protective cap
- RVS stake
- Feedline grounding / entry and line isolation accessories
- Coax cable & terminations (if needed)
- Stabilizer / radial kit (~4×2 m) for poor soil
US Mast Reference
Recommended US-sourced tube
For customers sourcing their own radiator in the US, a close match to the supplied 6 m × 35 mm OD × ~2 mm wall marine tube is:
• 6061-T6 or 6063-T52 aluminum
• OD: 1-3/8 in (≈34.93 mm) • Wall: 0.083 in (≈2.11 mm) • Length: ~20 ft (≈6.1 m)
Ask for “1-3/8 in OD × 0.083 in wall × 20 ft 6061-T6 (or 6063-T52) aluminum tube” at an online metals supplier or local marine/awning shop.
For customers sourcing their own radiator in the US, a close match to the supplied 6 m × 35 mm OD × ~2 mm wall marine tube is:
• 6061-T6 or 6063-T52 aluminum
• OD: 1-3/8 in (≈34.93 mm) • Wall: 0.083 in (≈2.11 mm) • Length: ~20 ft (≈6.1 m)
Ask for “1-3/8 in OD × 0.083 in wall × 20 ft 6061-T6 (or 6063-T52) aluminum tube” at an online metals supplier or local marine/awning shop.
About the VerticalVortex
VerticalVortex is a low-band HF active E-field receive antenna optimized for 160 m through 40 m, with usable coverage across LF/HF up to ~30 MHz. The current revision focuses on controlled bandwidth, strong-signal robustness, and cleaner results on long feedlines.
Key Highlights
- Controlled roll-off: selectable bandwidth shaping helps reduce out-of-band energy and receiver overload.
- Robust protection: layered protection and optional clamping to handle static and strong nearby signals.
- Optional station-controlled mute: can be muted via an external control box. No RF-sensed automatic cut-off in this revision. When power is removed, the output is automatically shorted to ground.
- Coax-friendly output: defined output impedance for long coax runs, with 75 Ω.
- Cleaner noise behavior: built-in common-mode suppression at the feedline interface.
- Flexible powering: coax-fed DC (via injector) or external DC, with internal regulation and filtering.
- Array-ready: suitable for single-antenna use or phased receive arrays.
Technical Overview
Full details, configuration options, and measurements: VerticalVortex Technical Overview.
Full details, configuration options, and measurements: VerticalVortex Technical Overview.
For best common-mode control, use a feedline isolator near the antenna and another at the shack entry, and bond/ground the feedline at the mast base.
Mini-FAQ
- Which bands is it for? Optimized for 160/80/60/40 m; usable across LF/HF up to ~30 MHz.
- How do I power it? Coax-fed DC via the included injector, or an external DC feed (details in the Technical Overview).
- Can I use it near a TX antenna? It’s designed for strong-signal environments, but keep reasonable spacing and follow good station grounding/common-mode practices.
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