Ciro Mazzoni introduces the STEALTH LOOP - a compact HF transmitting antenna that offers automatic tuning continuous coverage from 6.6 to 29.8 MHz when interfaced with a supported HF transceiver. It handles 125 watts and tunes to a 1.3:1 SWR. This fantastic antenna is only 54 inches long, 19.6 inches high and 10.2 inches wide and weighs only 15.4 lbs. It is made with a very rugged 60/60 aluminum alloy and powder coated in a dark green finish that is perfect for stealth operations.The STEALTH LOOP is an excellent portable and stealth HF antenna for 40 through 10 meters. It is intended to be set on a metal table or bench, will work well when placed on top of the metal roof of your parked vehicle and will also work when placed directly on the ground. An optional metal-fabric ground plane mat is available if a non-metallic (wood or plastic) table must be used, or a sheet of metal or metal screen may be used instead, which measures about 5 ft. 3 in. x  2 ft. 6 in. SWR adjustment is made with height adjustable feet.  

Stealth Loop

The included ATU 2.0 Automatic Tuner Unit LOOP ANTENNA Controller operates the tuning motor of the STEALTH LOOP remotely via an included two-conductor 16.4 ft. control cable** (Extension Cable assemblies are available)..

ATU 2.0

Automatic STEALTH LOOP antenna tuning is supported with optional Radio Interface Cables for select Elecraft, Kenwood, and Yaesu models by RS-232 COM or CAT and by CI-V “Remote” for Icom models. Tracking your transceiver VFO and band changes, the frequency information is read by the ATU 2.0 unit directly from the radio, which tunes the LOOP antenna automatically to the displayed frequency.

Manual tuning is easy for any radio that cannot be directly interfaced. Using the numeric keyboard included with ATU 2.0 Loop Controller, enter the desired frequency, wait a moment while the STEALTH LOOP antenna is tuned automatically and it is ready to use. This works for receivers and transceivers. There is no difficult tuning process, no note taking or complicated search for lowest SWR. The ATU 2.0 display shows frequency and SWR immediately and LEDs signal the status of the controller and the STEALTH LOOP.

Magnetic loop antennas typically have a small negative gain when compared to a dipole. However, their signal to noise ratio far exceeds that of a dipole. It’s their enhanced S/N ratio that makes these magnetic loops superior receiving antennas. They bring exciting new capabilities to limited space operations with unparalleled reliability and dramatically higher power handling. These are simply the best small transmitting loops available in the world!

STEALTH LOOP Specifications:* Frequency Range: 6.6 to 29.8 MHz* SWR: 1.3:1 typical* Front to Back ratio: 6 dB* Front to Side ratio: 25 dB* Input Impedance* Power Rating: 125 W* Bandwidth: 5 kHz @ 7 MHz, 8 kHz @ 14 MHz, 15 kHz @ 21 MHz, 25 kHz @ 28 MHz* Tuning Time: 4 seconds average, 10 seconds Max.** Supplied Control Cable is 16.4 ft. (5m). Extension cables with weather-resistant connectors are available in 5, 10 and 20 meter lengths, MZZ-SLA004, -SLA005 or SLA006, respectively.

The Stealth Loop offers HF operations for many Amateurs who are not able to put up a visible antenna. This antenna can be hidden in a flower or vegetable garden, placed behind hedges, or it may be simply set out on a table and adorned with decorations. The Stealth Loop is so unusually beautiful, it can pass as abstract art!Wherever Amateur Radio seems to be an impossibility due to antenna restrictions, turn to the STEALTH LOOP by I3VHF available from DX Engineering!