HG3 QRO Mag Loop


HG3 QRO Mag Loop Antenna 80m*-10m

The HG3 QRO MLA. Legal limit power with RapidTune tm. Ultra high Q vacuum cap provides superior efficiency and low losses. New smart controller makes operation a joy.

We announced the HG3 MLA in June 2020. It achieved a high customer satisfaction rate. We suspected that many hams wanted a higher power MLA. So, we started design on the HG3 QRO version. After thorough research and design phases, we have now completed development and are in production. We believe we’ve raised the bar of MLA performance. We’re very exited with the results. In addition to the higher power (1,500W PEP), we added some really useful new features. Starting with an all new controller (HG3plus), the tuner features a stepper motor positioned high voltage, high Q vacuum capacitor, with 43,000 step resolution and virtually no backlash. This allows the operator to precisely set their band preferences, or they can use the factory settings. By using an RS232 controller cable, longer remote control is possible.  By adding the optional second radiator loop (two turns), 80 meter coverage, at full power, is also provided.  Gone is the USB version key requirement. We totally redesigned the Auto tuning algorithm. Because of the much greater resolution, we are able to scan each band for the lowest SWR and achieve an impedance solutioning typically in less than ten seconds.  We call this RapidTune tm.  It is a closed loop system and allows auto tuning with most HF radios. Other digital tuning methods are open loop systems. They require a radio to loop tuner interface and often suffer from calibration drift. 

Because of Covid-19, manufacturing lead times have increased and availability has been pushed out. We expect shipment later in February. We cannot accept advance orders right now. The retail price has yet to be determined. We will keep you posted as to specials, pricing and availability. 

  • Full Legal Limit Power (1500 W PEP)
  • Stepper Controlled Vacuum Cap (43,000 step resolution)
  • RapidTune tm on SWR  (<10 second SWR solution) 
  • SWR Tuning Bar-graph (instant SWR feedback)
  • Optical Limit Switch (No fussy mechanical switches)
  • Deluxe Outdoor Deployable Polycase 
  • LMR600 Radiator For High Efficiency
  • 80-10 meters* bands
  • Continuously Tunes the Entire 3.5MHz – 30MHz Frequency Range 

* With optional second radiator, specifications subject to change without notice.

A special thanks to the development team: Audrie Crane manufacturing, Rob Kirkpatrick KI6HNA engineer, Travis Canon firmware, Florene Stenbock wordsmith, Roger Stenbock W1RMS engineer – 73 Roger


QST reviews HG3 Stepper Mag Loop!

ARRL Reviewed the HG3 Mag Loop Antenna in the Jan 2021 issue of QST. it gave it high marks for effectiveness, easy of use and precise repeatable operation. See the entire review here: QST HG3 review

The HG3 our flagship magnetic loop antenna, is now available for sale. The HG3  delivers unprecedented capability, performance and convenience. It employs a proven, accurate and repeatable stepper motor design.  Band selection, remote tuning, including optional loop rotation, is controlled by a microcontroller driving a high-resolution stepper motor.  An integrated digital SWR bridge allows auto-tuning based on an SWR scan. This ensures compatibility with most radios. Manual tuning uses a convenient rotary encoder knob – no more finicky push buttons. The four-line LCD shows the band selected, SWR, ERP, Cap value and more. Order the HG3 Stepper Mag Loop here.

73, Roger W1RMS


HG1 Expedition on SOTA field day

PreciseLOOP HG1 Expedition 
The PreciseLOOP antennas are for Receive and Transmit use. The new PreciseLOOP HG-1 is a high gain Magnetic Loop Antenna (MLA). It can be deployed quickly and is ideal for use in places where HOA restrictions make full size wire antennas impossible, or where there is not enough room to erect a conventional antenna. When designed and constructed properly, an MLA can perform as well or even better than a dipole antenna. The PreciseLOOP is compared to a commercial portable dipole antenna.


Test conducted in the field. Video MLA versus dipole

Comparing the Mag Loop to a dipole

New PreciseLOOP  Video

Check this video from Greg VA7BC

PreciseLOOP HG-1 Antenna

PreciseLOOP SOTA-1 Antenna

The Snows of Kilimanjaro… June 2018 CQ Magazine

PreciseRF QST half page 2018 v5 (2)