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Hi Christoph, re. Loop and Beverage comparisons My 160m - 220m beverages are usually about 3dB better in s/n than the K9AY loop on 1.8 and 3.5MHz in their design directions, as one would expect from

Hi Christoph, Yes I need the (remote) preamp nearly all the time to get sufficient s/n over-ride not helped by feeder length of <200m.. Multi-joined RG6 most over 30 years old with loss about 4dB at

That's exactly how it is! Thank you, John, for the solid explanation. I am fascinated that despite the relatively small size of your AziLoop, you are often able to compare it with the Beverage and

Bill, My reply crossed with yours. Glad your results are better. My nulls in both loop and K9AY modes are very close to the bearing -180deg as expected, when f/b is optimised 73, John

Hi Bill, We have not heard further from you so I assume you have not improved your f/b. I have been using my Aziloop in K9AY mode for a year now and always managed to get groundwave f/b ratios

Here is a list of stations that I used to further check my AZIloop.? I used my trusty Perseus and got better results than from the Apache.? I believe the AZI loop is working ok. I believe low nulls

I don't doubt. But I'm retired and have the time. However, the scourge of retirement: Have the time but don't have the $$$. Dave - W?LEV <martin_ehrenfried@...> wrote:

With my short E-field probes, I've never tried paralleling JFETS. I need to try that someday with the J-310's. I usually follow those with a simple emitter follower to establish 50-ohms for the

If you want unbelievable nulls, that happen in about 5 seconds, buy a Perseus 22. You can also manually steer the signals with it to. If you are using verticals they need to be spaced about 200'

As a constructor, I'd also agree, however in this case I'd be tempted to buy. If you price up how much time, effort and cost, that would be required to develop and build your own version, with

Although the basic concepts and principles are sound, things have moved on over the 40+ years that have passed since the articles were published. Regards, Martin

Ralph Burhans wrote an excellent series of antenna articles in Radio Electronics in 1983:? ?February 1983, part 1 - All about VLF Active Antennas? ?March 1983, part 2 - All about VLF Active

Well, the truth be known, I mostly use the 0.5-meter "shielded" loop for DF'ing RFI. It's great for that. But, yes, the null is bidirectional. Dave - W?LEV [email protected]> wrote: -- *Dave

Hi Dave.. totally agree..when comes to antennas I hate to buy!! However, not all feel the need to do so, or have the time to do. (Dave you are on rsgb technical, you have no doubt seen my thread

Understand, Simon. In retirement, US $$$$ are not an option for me. That's why, whenever possible, I build my own. Dave - W?LEV [email protected]> wrote: -- *Dave - W?LEV*

Hi Bill ( and Dave) Bill has paid a good few bucks for the Azi-loop if its from UK, so wants it to work as advertised.( if not a knock off.) It should av a better f/b than that. But Bill remember

If you are searching for nulls, I find a "shielded" 0.5-meter loop made of 0.5-inch copper tubing hard to beat. Five internal turns, the center of which is cut and brought out to a home brew and

363 930 1030 610 khz. 73, Bill, WA2DVUCape May, NJ

Hi Bill On what frequencies? Simon g0zen

Hi Martin, Thank you very much for the explanation, it all makes sense. Yes I was thinking flat plate antenna. Mikek