CIRO MAZZONI STEALH LOOP HF Continuous bands 10-12-15-17-20-30-40 m

STEALTH Loop

The STEALTH Loop is a high-performance loop antenna designed for radio amateurs seeking a compact, rugged solution with high-quality transmission and reception across a wide frequency range. Its advanced design allows continuous coverage from 6.6 to 29.8 MHz , offering precise SWR tuning with typical values of 1:1.3.

Thanks to its TIG (Tungsten Inert Gas) welded aluminum alloy construction, the STEALTH Loop is lightweight yet extremely weather-resistant, making it ideal for both fixed and portable installations. The use of stainless steel hardware ensures a long service life even in harsh weather conditions.

One of the great advantages of this antenna is its low noise and harmonics level , which provides cleaner and more stable signals. Furthermore, its tuning time is very fast (average 4 seconds, maximum 10), making it an agile tool for DX operators seeking efficiency. Despite its compact size, its design allows it to achieve performance comparable to much larger antennas, with a gain of just -4 dB at 7 MHz and -0.3 dB at 28 MHz compared to a half-wave dipole.

In terms of directivity, it offers a front-to-back ratio of 6 dB and a front-to-side ratio of 25 dB, improving the rejection of unwanted signals. All this with a continuous power handling of 125 W and a frequency-adjusted band response: 5 kHz to 7 MHz, 8 kHz to 14 MHz, 15 kHz to 21 MHz, and 25 kHz to 28 MHz.

Some of the features that the STEALTH Loop offers us are:

• Continuous coverage: 6.6 – 29.8 MHz
• Typical SWR: 1:1.3
• Front-to-back ratio: 6 dB
• Front-to-side ratio: 25 dB
• 50 O input with gamma match and ESD protection
• Noise and harmonics practically negligible
• Tuning time: average 4 s, maximum 10 s
• Maximum power: 125 W continuous (peak = continuous)