Magnetic Loop Antennas

Magnetic Loop Antenna is nothing like an ersatz (but not anything the top DX-men need)

Were you forced to remove your antenna from the roof of an apartment house?
Have you no chance to hang up a long-wire antenna?
Did you want to operate as /p during your vacation but your hotel declined to allow you to install even a small short-wave antenna?
Would you like to try the exotic /am operation from the balloon?


MLA IS YOUR SOLUTION!

All prices of antennas are inclusive of VAT and shipping for EU customers, non-EU customers should expect approximately + 100 EUR fee per shipped package.

Asterisk * indicates antenna price without CB4M.

Magnetic Loop Antennas Comparison LEARN MORE

MLA-M v.5
Magnetic Loop Antenna - Multiband

The oldest and best sold two-turn magnetic loop antenna developed by OK2ER. Its wide-band function achieved by a patented design is just excellent. No other MLA is available on the world market that can offer such wide-band coverage. This antenna is designed for QRP operation, 10 W at 3.5 MHz, 20 W elsewhere.
Antennas are delivered with an individually filed test protocol.

€ 329 BUY NOW LEARN MORE

MLA-M v.5 KIT
Magnetic Loop Antenna - Multiband

The oldest and best sold two-turn magnetic loop antenna developed by OK2ER. Its wide-band function achieved by a patented design is just excellent. No other MLA is available on the world market that can offer such wide-band coverage. This antenna is designed for QRP operation, 10 W at 3.5 MHz, 20 W elsewhere.
As a semi-kit, not assembled, this antenna is delivered without a test protocol.

€ 298 BUY NOW LEARN MORE

MLA-T PRO v.3
Magnetic Loop Antenna Top Bands

The second oldest and best sold four-turn magnetic loop antenna developed by OK2ER. It is destined for a compromising operation at the lowest short-wave amateur bands 1.8 and 3.5 MHz.
Adding the next two bands (5.3 and 7 MHz) is done like in the MLA-M by shorting two turns. Band switching is done manually. The antenna is tuned by a remotely controlled high-voltage variable capacitor using a DC motor with a flexible coupling. Tuning control utilizes PWM in the CB4M driver unit. There is no similar antenna capable of 1.8 MHz operation on the world market.
Antenna is delivered with an individually filed test protocol.

€ 798 € 698 * BUY NOW LEARN MORE

MLA-B
The MLA-B (Big) are two square loops connected in series.

The MLA-B (Big) are two square loops connected in series, with a side length of 2.5 m (20 meter circumference). This antenna have been testing at 1.8 and 3.5 MHz.The MLA-B needs only some 5 sq.meters of area. For this reason is this antenna is quite acceptable for use at 160 and 80 meter bands as stacionar antenna in city QTH or for lower-level expeditions.

from € 1 090 BUY NOW LEARN MORE

MLA-C v.3
Magnetic Loop Antenna - Base or Portable SW magnetic Loop Antenna

This magnetic loop antenna was originally designed by OK2BUH, widely improved by OK2ER.
It is destined for 3.5 to 7 MHz operation, with up to 100W input. It is also usable at 5.3 MHz.
The antenna is remotely tuned by a DC motor with a flexible coupling to the high-voltage variable capacitor. Tuning is done by an inteligent PWM by CB4M driver. On 3.5 MHz, its function is lightly compromised, at 7 MHz it is suitable also for DX communication.
MLA-C is very huge among other commercial MLAs, so the shipping is quite complicated.
The advantage is an easy and fast assebly, from unpacking to the full operation in minutes.
It is ideal for /m, /mm operation It can be mounted on a flat roof to serve as a base antenna, if there is no other option.
Antennas are delivered with individually filed test protocols.

€ 798 € 698 * BUY NOW LEARN MORE

MLA-C v.5 KIT
Magnetic Loop Antenna - Base or Portable SW magnetic Loop Antenna

MLA-C v.4 KIT is replaced by MLA-C v.5 KIT for the same price. The frequency range is extended by two additional bands, 10 MHz and 14 MHz, similar to the newer, smaller size MLA-V KIT.

This magnetic loop antenna was originally designed by OK2BUH, widely improved by OK2ER.
It is destined for 3.5 to 7 MHz operation, with up to 100W input. It is also usable at 5.3 MHz.
The advantage is an easy and fast assebly, from unpacking to operation a dozen minutes, best in two persons
As it can be completely disassembled, it can be assembled anywhere the MLA-C could not be delivered. It is ideal for the use in lofts with narrow passages.

€ 748 € 648 * BUY NOW LEARN MORE

MLA-V KIT
Small, Foldable, Transportable

The magnetic loop antenna, MLA-C, has been modified and optimized by computer modeling, to achieve an optimum size and efficiency. MLA-V is designed for operations at 3.5, 5.3, 7, 10, 14 and 18 MHz, with input power up to 100 W. It is tuned remotely by a DC motor driving a high-voltage variable capacitor, by a CB4M driver unit using an intelligent PWM mode.
At 3.5 and 18 MHz, operation is slightly compromising. At 7, 10 and 14 MHz the antenna offers very good results even in DX mode. MLA-V KIT is the newest of the series developed by OK2ER. It is preferable for /m and /mm operation, but it works well in any mode. It can be completely disasssembled and reassembled anywhere where transporting the assembled MLA-C would be impossible. Therefore it is ideal in crowded lofts with a limited access.
Antennas are delivered with individually filed test protocols.

€ 698 € 598 * BUY NOW LEARN MORE

MLA-R v.2 KIT
Small, Foldable, Transportable

This is a MLA-V magnetic loop antenna with a reduced size. Parameters are similar to MLA-V but the gain is some 15-20 per cent lower. Its advantage is a small size with a good cost/size/performance ratio. ML-R operates at 3.5, 5.3, 7, 10, 14 and 18 MHz with an input power of up to 100 W. It is tuned remotely by a DC motor on the axis of a high-voltage variable capacitor, by a CB4 M driver using an intelligent PWM.
MLA-R kit is the newest of the development series of OK2ER workshop. It is advantageous in /m, /mm operation and also other modes. As it can be completely disassembled, it can be installed in any location otherwise not accessible for an ordinary MLA-C antenna. It can be used on balconies of panel buildings , in walk-in closets, and the like.
Antennas are delivered with individually filed test protocols.

€ 748 € 648 * BUY NOW LEARN MORE

MLA-ER/30-10
A Short-Wave Magnetic Loop Antenna for portable and SOTA activities

The MLA-ER is a small-size compromise design of a short-wave magnetic loop antenna (by OK2ER), suitable mostly for portable activities such as an urban QTH. It can be used in locations where other gain antennas can not be used, such as a balcony, indoors, or from a loft.

from € 148 BUY NOW LEARN MORE

CB4M
the remote tuning control box for magnetic loop antennas, MLA

CB4M is an electronic unit designed to remotely tune magnetic loop antennas. Pulse-width modulation (PWM) is utilized to control rotation speed of a DC motor with a gear which drives the main tuning capacitor, the part of L-C circuit in a MLA. The microprocessor-controlled electronic unit was optimized specifically for the purpose of tuning the MLA. The process is sometimes named “spread tuning”.

€ 125 BUY NOW LEARN MORE

C-UNI
Capacitor for Magnetic Loop Antennas

 

€ 150 BUY NOW

C-UNI & CB4M
Capacitor for Magnetic Loop Antennas and the remote tuning control box for magnetic loop antennas

 

€ 250 BUY NOW

Book - Magnetic Loop Antenna
Slightly Different Each Time

The book Magnetic Loop Antenna with the subtitle Slightly Different Each Time, was firstly published in Czech language in January 2015. The writing style of the book is a good example of an effective teamwork between academic theory and practice, where both of the authors examine the subject from their own points of view.

Free worldwide shipping.

€ 23 BUY NOW LEARN MORE

Magnetic Loop Antennas

Magnetic Loop Antennas (MLA) have disappeared from the field of radio communication due to a gradual discoveries and practical use of higher radio frequency bands (shorter wave lengths). More different antenna types appeared in this field of high radio frequencies. Conversion of alternating current power into electromagnetic field by utilizing its magnetic component (magnetic loop antennas) was used mostly at long and medium waves. For short-wave communication, other antenna types prevailed in professional applications, and radio amateurs followed.

The technical progress follows a spiral course. Physical facts that pushed the magnetic loop antennas out of use, was recently reincarnated in modern versions. MLAs are now being used not only in short-wave bands but also in VHF and UHF bands. If compared with a cheaper wire dipole, more demanding MLAs must offer an important advantage in operation, otherwise the growing number of happy users cannot be explained. The controversial success of MLAs is surprising as the new MLAs are quite costly commercial products on antenna market. We will try to explain the advantage and application preference for each model separately.

OK2ER devoted most of his time to MLA development after retiring from BTV company. He has published many forgotten facts about MLAs in radio ham magazines. A welcome education in the field was brought by Magnetic Loop Antenna book, by Burger and Dvorský, published in Czech in 2014 and in English in 2015. 500 and 2500 issues were sold so far, respectively.

After a break of several years due to health issues, OK2ER is back to work on more unfinished MLA versions. Mostly there are MLA-ER types as well as kit versions, MLA-C KIT, a new MLA-V KIT and MLA-R KIT, described later in detail. Important details that also allow a home-made copies, will be published in a third reprint of the mentioned monograph, expected to launch in 2017.

Features

MLAs operate urprisingly well even located only one meter above ground. With 100W input and in a town center, surrounded with many grounded tin roofs, gutters and wire fences, the operator with a MLA can easily communicate with stations over hundreds and thousands kilometer distant. Without doubts, a 3-el Yagi may bring signals stronger by several S, but such antenna is much more costly and difficult to install.

Vacation Antenna

Vacation Antenna

A MLA is ideal short-wave companion for vacation and /p, /m, /mm, /am index operations.

Small Size

​Small Size

MLAs occupy the smallest possible space.

Easy to Transport

Easy to Transport

MLAs in KIT versions are easily transportable.

Small but efficient antennas

I am using both MLA-M and MLA-T at a complex housing of a city. It is well known that most dwellers live in a restricted area here in overoccupied Tokyo. However, we do not want to give up operating with HF antennas at our veranda. So we must beg for small but efficient antennas, MLA-M and MLA-T. feel very happy to use MLA-T especially on top bands.

Aki Kogure, JG1UNE

More references

Successful MLA versions from BTV development (manufactured/sold)

3000+ pcs

MLA BOOK

550+ pcs

MLA-M

65+ pcs

MLA-T

15+ pcs

MLA-C

​Email for a custom and/or unlimited license.

LOOPER SYSTEMS s.r.o.

Creators of Magnetic Loop Antennas

LOOPER SYSTEMS company was established by separation of Magnetic Loop division (MLA) which had been developed at B PLUS TV a.s. (BTV) company with a wider profile of activities.

LOOP ER name was taken from OK2ER who has supported MLA development before retiring from BTV.

LOOPER SYSTEMS s.r.o. Is a business mainly (but not exclusively) supporting magnetic loop antenna technology. One special sub-category of loop technology are RaMaLoop and PlazmaLoop that utilize the same technology but are used for another application. Therefore both loop categories are presented separately on LOOPER SYSTEMS website.

Oldřich Burger

Oldřich Burger OK2ER

Studied at High School of Electrical Engineering, Prague, later at Military Special Communications School, Nove Mesto nad Váhom, PF Ostrava. In 1970s worked as an electronic technician at Institute of Physical Metallurgy, Ostrava. Since 1989 he established a telecom company B plus TV, acted as a CEO of one of the first private local TV networks. Published many technical papers. Since 2009 studied magnetic loop antennas, MLA.


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