South Midlands Communications Group

Fixed Base NVIS Loop Antenna

Operating both NVIS and long distance sky wave.

Fixed NVIS Loop AntennaAs well as the compact mobile HF loop, two versions of fixed station loop antennas are also available, which operate on both NVIS and long distance sky-wave propagation modes across 3-30MHz.

The two versions are a wire element loop with 3m sides, and a solid element loop with 2.5m sides, each offering similar high efficiency. These are ideal for use where space is limited, and rival the performance of much larger wideband HF wire antennas.

TX Power Input Range 1.5-200 Watts PEP
Continuous TX CW/Data Power 80W
Number of operating channels Unlimited
Non-Volatile Channel Memory Addresses 170 (165 TX, 5 RX)
Input Impedance Range 50 ohms
VSWR Typically less than 2:1 when tuned, (3:1 max)
DC Operating Range +10.0V to 18.5V DC, (+13.8 V DC nominal) 24V DC nominal also available on request
DC Current 900 mA average
Initial tuning response time (initial memory setting only) 2 - 20 sec per channel
Recurrent tuning response time (on-air use inc. freq hopping) Typically less than 10 ms per channel
Operational Temperature -35° to +70°C
Control Cable Standard 50 ohn coaxial cable plus DC feed 3m in length


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