SOTA-1 PreciseLOOP Light Weight Magnetic Loop Antenna


2 in stock

PreciseLOOP Add-ons

SKU: HG1-SOTA Category:


Kilimanjaro SOTA Activation

The PreciseLOOP SOTA-1 is a very light weight Magnetic Loop Antenna (MLA) ideal for SOTA operations for receive and transmit use. It is a convenient, lightweight magnetic loop antenna. It can be deployed quickly and is ideal for use in portable operations such as Summit On The Air (SOTA) ops, where light weight and easy setup is important. Many operators favor the MLA for field day and portable operations and where HOA restrictions limit larger antennas. When designed and constructed properly, a MLA can perform as well or even better than a dipole antenna.  A MLA is a very simple antenna. It is just an inductor formed by a wire loop and capacitor tuned to resonance. How well this antenna works depends on several factors: The PreciseLOOP SOTA-1 is optimized for portable and SOTA operations featuring portability and QRP power handling capability (15W PEP). It features a precision 3:1 reduction dial with calibrated dial marking, a high surface area Cell-flex 3/8 radiation loop, copper tube induction loop and a twelve foot 50 ohm feed line. It comes in a light weight convenient premium nylon bag.

Check this video from Greg VA7BC

Low Loss Tuner
The tuner is the heart of any MLA. The capacitor must be very low loss with high Q. It must have sufficient high voltage rating to handle the designed power. The PreciseLOOP SOTA-1 features a custom dual stator high Q air variable capacitor driven by a 3:1 reduction dial along with calibrated dial markings.

PreciseLOOP SOTA-1 easily fits into a light weight premium nylon bag.


SWR/RL 14 MHz: 1.01 / 41.09 dB,
29 MHz: 1.14 / 23.40 dB
LOOP CURRENT 14 MHz @ 10 W: 3.0 A.
29 MHz @ 10 W: 2.8 A
BW (2.5 SWR) 14 MHz: 43.1 kHz,
29 MH: 321 kHz
RADIATION CURRENT 14 MHz @ 10 W: 1.11 A,
29 MHz @ 10 W: 2.46 A;
IMPEDANCE 14 MHz: 59.17 Ω,
29 MHz: 56.85 Ω
LOSS CURRENT 14 MHz @ 10 W: 1.89 A,
29 MHz @ 10 W: 330 mA;
INDUCTION LOOP Copper tube 26”


POWER RADIATION 14 MHz @ 10 W: 3.70 W,
29 MHz @ 10 W: 8.8 W;
RADIATION LOOP Low loss LMR 400 120” EFFICIENCY % 14 MHz @ 10 W – 37% -4.3 dB
29 MHz @ 10 W – 88% -.5 dB
SURFACE AREA 75.0 sq. in GAIN 14 MHz @ 10 W: 1.5dBi (3-7 *dBd), 29 MHz @ 10 W: 1.5dBi (3-7 *dBd) * versus Dipole at 12’

Air variable dual stator


TUNING METHOD 3:1 marked  dial Mast 3 feet 6” PVC 1” diameter
29 MHz: 90.4
Weight with bag 3.5 lb. Included items: 10′ Radiator, Induction Loop, tuner, Bag
RADIATION RESISTANCE (Rrad) 14 MHz @ 10 W: .074 Ω,
29 MHz @ 10 W: 1.36 Ω
Specifications based actual measurements and/or computer models. All products are calibrated and tested to meet or exceed published specifications. PreciseRF warrants its products to be free from defects in material and workmanship for one (1) year from the date of purchase. If you need support or service for your PreciseRF product, whether the product is under warranty or otherwise, please contact PreciseRF and arrange for a return or repair authorization. Manufacture’s Suggested Retail Price (MSRP). Prices and specifications subject to change without notice. (c) 2018 all rights reserved preciseRF


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