Mfj magnetic loop

A flimsy and rather poorly made. Rugged all welded aluminium construction, it is fully weatherproof and does not require a separate control cable, the coax carries the signal and the DC contro. Drape a wire around a bookcase or window and attach both ends to this new MFJ Small Loop Tuner.

It instantly turns into a small, h. Find great deals on eBay for mfj loop antenna.

This antenna is my new DX Monster! Web site dedicated to ham radio (amateur radio). Free Delivery on Eligible Orders! I am glad that you are enjoying your MFJ loop.

Active Elements – working to improve accessibility for radio amateurs with disabilities. It can cover six HF amateur bands in one three-foot antenna, but the loop will also cover all. About the commercially-made small magnetic loop antenna used at this QTH for the bands 30M to 10M (10MHz to 30MHz).

The radiation pattern of a small loop antenna is essentially omni-directional with the exception of two very narrow nulls in the axis of the loop. The loop covers from to 29. I believe MFJ are the only commercial manufacturers of these but they are VERY expensive! First off, all the reports of poor quality control on these hold true. The antenna rattled upon removal from box.

I removed the twenty screws holding the plastic. Found some tech notes about loop antennas at MFJ. Skip the product-specific stuff, go about halfway down the page. The control box failed the QC check it was now time to open up the antenna (a must according to magnetic loop user group) The visual inspection looked very good now. Before the antenna went into operartion the motor unit has to be replaced.

Loop Tuner Use As pointed out in the MFJ -935B manual, you need to take RF exposure precautions due to the high RF power density of a small loop antenna system. The G4ILO Wonder Loop is an inexpensive, easy to make magnetic loop antenna that covers five HF bands, 40m through 15m. It is designed for portability, and can be assembled or disassembled in about a minute.

When disassembled the antenna easily fits in a suitcase or backpack. Hey All, Looking for anyone who has had experience with either antenna. MFJ -9uses only high-Q air variable capacitors for tuning and matching.

The MFJ is a magnetic loop antenna for 15m-40m bands. This page provides a top-level description of Small Transmitting Loop (STL) antennas (a.k.a. Magnetic Loop Antenna, MLA), and my two versions of such an antenna for. A Magnetic Loop Antenna is basically just a resonant circuit using an oversized inductor and an adjustable capacitor.

Does anyone know whether the same. So i finally got around to checking this thing out. It will handle 1watts and is remotely controlled in the shack via motorized control that uses the feedline for voltage.

HF Magnetic Loop Antennas suppliers is a curation of resources about , Alpha Antenna, MTM Scientific Radio Loop Antenna, Stealth Telecom, Alexloop antenna, MFJ. A magnetic loop antenna is electrically simple and looks like a two turn transformer with a tuning capacitor in the larger loop. The “primary” of this transformer is a small loop of wire, fed by standard Ohm coaxial cable (coax) that goes to your HF transceiver. The BIG loop is like a transformer ‘secondary’, large. Can also be collected in person 479.

When mounted vertically they offer a fan-shaped radiation pattern in a line with the loop with nulls off the side. Magnetic loop receive antennas are a great weapon in the fight against natural and man-made noise. The Small foot diameter loop is naturally stealthy for HOA challenges and a perfect complement for vertical and small wire transmit antennas.