The book is inspiring and I think is unique. Somewhere on the web I found a negative comment about it from someone that wanted over the counter recipes but the truth is that building a good MLA is not easy and it's not cheap either and involves understanding the concepts and experimentation.The section about the theory is very useful along with the references and the next section about the development of your commercial MLA's is pretty interesting specially for the use of the design with multiple turns. Please let me know if there is a new printing with additional information as I read on the site.
I have checked your products and I am impressed with the build quality. I'll keep an eye on the MLA-A as a candidate when I need one for portable use or for digital modes. I think that it is more elaborated compared to others, similarly priced, commercial MLA's. I will certainly recommend visiting your web site to others looking for these antennas and I like that you make it clear what to expect from an MLA.
Thanks again, best regards and best 73.
Leonardo R. Leon, OA4DQA
With regards to your great MLA book. Thanks,
Roderick Wall, VK3YC
Hi, I purchased a copy of your book at the ARRL headquarters the other day and found it very helpful and well -written.
Ken Burgess, KB1Z
I tested the MLA by skimmers on 30, 20, 17 and 15 meters. Evaluation: comparable reports to those with a LW, sometimes also better. As conditions were not good at 12 and 10 meters, I still have to try it there. Now I am installing 60m band in my ATS TRX, I would like to try the MLA also at my other QTH and on 60 m band.
I have to say that MLA-C works quite well for me on 40 and 60 meters but on 80 meters I do not have a large number of qso’s on CW, maybe because of my geographical qth (I only have land to east or north east and south, Europe and Africa) or maybe because of the low SFI. Nevertheless, I am very happy with the antenna and for the price and for the shape of the antenna (we do not need to install a mast with guides, for instance) it deserves what I paid for it. Thanks, Olda.
David Quental, CT1DRB
I examined it again and really I can only congratulate. With a completely invisible antenna in the room I can normally work on 80m. Tuning can be quickly drilled. Now I did on the first call and the EM7 G3 for 579 and 599 After my CQ also responded skimmers . All QSOs and test for skimmers was WKD on the my out 50W. I think, min. 3 db reserve to LP 100 W. So what can I say, good luck in JA and elsewhere. Super, my congratulation!!!
My QTH is on 9h floor in a 13-story building. My antenna sits on a chair near a window. I detected no change by locating it on my balcony. After a while of operating my station I became convinced that MLA is a genial invention of its kind. I normally believe only in things I can prove myself. Although I am an electronic engineer and a teacher at a high school of electronics, I do not trust too much antenna theories. First I want to try it, then I can evaluate it. My excitement of MLA-M was high and exceeded any expectation. The magnetic loop antenna is no chimaira but an excellent antenna, mostly suited for those having problems to locate suitable antennas on apartment blocks and similar situations.
Hello Oldrich, Very great job ! Thank 73
HI, I recently read the book Magnetic Loop Antenna slightly different each time and I am interested in your MLA-M with tuner loop antenna. Ihave built several versions of magnetic coupled loop antennas myself which have worked well but was very impressed with your design and the look of your workmanship.
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
Magnetic loop represents totally different feeling of the air. Because of the nature of MLA, it uses primarily magnetic part of radio waves, performs with a very strictly defined directional effect and works as a frequency preselector. Thus, in compare with the common antennas, you can use those effects to almost eliminate the disturbing and jamming signals, focusing on the interesting weak ones. And you can use MLA for transmitting, too... The experience is great. I recommend it.
In addition to the generally known reasons WHY a MLA, I would offer more comments on MLA-M. The matching is perfect! On all bands it literally sucks out all TCVR power out, even without the need to use an antenna tuner. Very great during thunderstorms- I can use it indoors during a storm, when it also rejects QRN. A good reference antenna: given my limited land area, I cannot build more antennas next to each other, switch them and compare by skimmers. Thanks to MLA I can use it as a reference while I build other antennas and test them one after another. MLA is good due to its good match at all bands, I cannot afford another larger one as a reference.
A joke to finish: our grandsons were excited with Star Gate series. So they connect an old notebook to my MLA and start entering „addresses“. After I hear „seventh symbol insterted“, I can see toys and fluffy bears flying through MLA rings as they „fly“ to other planets... So the MLA entered as an indivisible part of our interior and my life style... D
I had an exciting QSO last night (23/07/2017, 0303 UTC) on 80 meters using the MLA-C. I worked RI1ANO in the South Shetland Islands of Antarctica on JT65. The distance and bearing from my location to that of RI1ANO is 12,288 km at 164 degrees. I have to admit that I’ve never thought such a thing to be possible for me on 80 meters and I’m still amazed by what happened.
What amazes me even further is that my MLA-C is on a north side balcony. It must be magic.
There are times that I wish for the MLA-C to work better than it does on 40 meters but I truly love the antenna on 60 and 80.
Dr Olda. I use aerial MLA cca 1.5 years. In first I use tcvr from MFJ who had 5 W output. Now I have tcvr KX3. I live in town Plzen where is a big QRM and QSOs with that antenna were nothing much. But on my weekend house - that was very success !! I had QSO with 10 watts -stations from Arizona and also from Florida. MLA is beautiful antenna for QRP QSOs! 73 and MLA forever!