OctaLoop2 Mini — A shielded active Loop antenna — 500 KHz – 30 MHz

Included

• OctaLoop Mini Antenna 60 cm diameter with enclosure
• Stainless Steel (RVS316) mounting bracket
• Bias-T (13.8 V) — F-type to SMA
• Short SMA-to-BNC patch

Optional

• 10 m INTSAT-170-ELITE 75 Ω coax (2× F-type connectors)
• RVS Ground Peg (with F bulkhead) + RX Line Isolator

Product Description

The OctaLoop Mini is a shielded active H-field magnetic loop engineered for low-noise HF reception. Its geometry and shielding provide inherently low pickup of electric-field noise, yielding cleaner signals even in high-EMI urban environments. The design offers deep nulls that allow operators to rotate the loop and suppress noise from specific directions.

Optimized coverage is 7–30 MHz, while remaining effective down to ~500 kHz. This makes the OctaLoop Mini a versatile choice for SWL, amateur DXing, utility monitoring, and SDR applications.

Key Features

• Wideband Coverage: 500 kHz – 50 MHz (optimized for 7–30 MHz)
• High Linearity: push-pull amplifier design with IP3 > +40 dBm for strong dynamic range
• Input Protection: gas-discharge arrestor + diode limiter network to guard against surges
• Common-Mode Rejection: dedicated choke at the loop feedpoint to suppress unwanted currents
• Pre-Filtering: 50 MHz low-pass filter with NP0/COG capacitors blocks out-of-band interference
• Transformer-Coupled Output: broadband transformer with ESD-protected F-connector
• Bias-T Powered: 13.8 V via included injector, with local regulation to stable 10 V rails
• Supply Protection: reverse-polarity diode and transient suppressor for resilience
• Deep Nulls: sharp directional nulls for rejecting local EMI sources
• Compact & Rugged: 60 cm diameter loop with stainless steel mounting hardware

Placement & Grounding

Mount away from power lines and buildings. Typical height: 1.2–5 m. For long coax runs, add a line isolator midway. Ground the coax braid at the mast base (our RVS ground peg simplifies this).

Applications

• AM/MW broadcast, SWL, utilities (e.g., NAVTEX, time signals), beacons
• Amateur HF (160–10 m) reception and propagation study
• Portable/field setups and SDR monitoring

Technical Data

• Frequency Range: 500 kHz – 50 MHz (optimized ~7–30 MHz)
• Impedance: 75 Ω
• Power Supply: 13.8 V via bias-T (~180 mA)
• Polarization: Magnetic (H-field)
• Connector: F-type at bias-T
• Loop Size: 60 cm diameter (≈1.9 m circumference)
• Weight: ~1.2 kg
• Operating Temp: −20 °C to +50 °C
• Pole Mount: 30–68 mm