MFJ-935C Tuner for Loop-Antennas

incl. VAT, plus shipping €335.29

In stock, shipped in 1 to 2 days


Top Features

  • Power handling up to 150 W

Supply Scope

  • MFJ-935C tuner
  • DC power supply cable; 0.85 meters
Ideal tuner for experiments with magnetic loop antennas. Simply wind a wire around a frame or hang it between two trees and connect both ends to the MFJ-935C antenna tuner - and you have an efficient Magnetic Loop!

The MFJ-935C uses a large butterfly capacitor to tune a self-built loop antenna. Depending on the wire length you can cover the frequency range from 3.5 to 30 MHz, but not with the same wire length. The tuner is designed for a maximum power of 150W PEP.

Magnetic loop antennas are known for their very good efficiency in relation to the size of the antenna. They achieve a low radiation angle and are therefore well suited for DX. When receiving, such antenna types prove to be very quiet, QRM and QRN are reduced due to the narrow bandwidth. Even simple receivers benefit because the loop antenna acts like a pre-selector. The actual frequency range results from the wire length, the shape of the loop, the environment and the height above ground. Ideal would be λ/4 for the main operating band, usually a loop of fixed length will reach a frequency range with a ratio of 1:1.5, e.g. from 3.5 to 5.25 MHz, or 5 to 7.5 MHz, or 10 to 15 MHz etc. The shape of the loop does not matter, but a larger enclosed area would be ideal. The best ratio of circumference to area is of course a circle, if possible. Horizontally and not too high above ground, such loops form excellent skywave radiators for local traffic (NVIS). The connection to the radio is a PL socket, the antenna loop is connected with large screw terminals. Size 152 x 127 x 228 mm, weight approx. 1.5 kg.
Technical Data
Product Name MFJ-935C
Tuner type Manual tuning
Brand MFJ
Max. Power [W] 150 W
Frequency Range 3 - 30 MHz
MFJ is a very well known and leading manufacturer of amateur radio products and accessories. For more than 40 years, MFJ has been developing and producing innovative products in the USA that no radio station should be without. The product range extends from radios and antennas to tuners and individual components.

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