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A decade back, I made use of an old tube-type Stoddart NM-22A Field Strength EMI/RFI receiver for this purpose, as, a tuned RF front end serves the purpose of fundamental filtering or notching. Beware

When using flexible conductors, we need some arrangement to keep the loop flat. Any significant torsion or twist presumably affects null depth. So just wondering if anyone has done the

I find the https://miguelvaca.github.io/vk3cpu/magloop.html Interactive loop calculator to be quite handy for actual loop design, if you want to quickly try changing a few different parameters to

Hi Gus, I mistakenly said "Diameter" when I meant perimeter (I did enter the correct perimeter in the calculator). I didn't know about the 66pacific.com calculator's error in computing inductance.?

My loop diameter is 36-inches. That makes the *circumference* 113-inches. That's what I measured. Dave - W ?LEV <mark-whittington@...> wrote:

Hi Mark, I reviewed your response: 1. The introduced two isolation resistors 1 Kohms each cannot be considered as a part of dummy aerial because any dummy aerial equivalent circuit should include

Mark, there are two things to check in the message shown below: 1) The item Jim called Loop Diameter is actually the Loop Length. 2) The 66pacific.com calculator, since it was released long ago, has

Unfortunately, I have no plans for this. I have built two of these antennas. One has been sold. I will also sell the second one after extensive testing.

I cannot measure this. Unfortunately I don't have such a measuring device. I am not a technician.

Very good reception. 1.5m over Ground. /g/loopantennas/photo/298235/3840297?p=Name%2C%2C%2C20%2C2%2C0%2C0

Hi Raphael, Your analysis is correct.? You could get there a little more directly: (generator level)? = (Isc)*(R_dummy_areal) =(0.707mA)*(2K Ohms) = 1.414V The dummy areal is a linear system.?

Location of tabulated results: ? /g/loopantennas/files/One%20meter%20loop%20simulation%20EZNEC%20PRO/Short%20Circuit%20Currents%20of%20Octagonal%20Loop.pdf

I put the loop dimensions in an online calculator often used to design small transmit loops ( https://www.66pacific.com/calculators/small-transmitting-loop-antenna-calculator.aspx ) Loop Diameter:

Chavdar, your rough model seems to be correct.? I obtained the following results: Before, when the feed point was at the bottom of the loop, the short circuit current (i.e. the Norton equivalent

I was looking for something else and stumbled across an article on designing with new FETS. https://www.interfet.com/jfet-datasheets/audio-electronics-jfet-new-frontier1-2.pdf I know from

The SPICE model of a particular transistor captures the beta in the parameter BF and the base spreading resistance in the parameters RB and RBM.? These parameters are not guaranteed but can be

It's a beauty!

I just finished build another Lankford Phaser, which is for sale. It works very well with 2 loops spaces 55', or more. I am getting up to 60dB nulls on some local

Hi Martin, There is another important benefit that I forgetfully omitted in the earlier reply. Look again at the linked Smith chart measurement, at 30 MHz, the impedance locus curls inward like your

Hi John, Some of this may simply be down to familiarity with a particular application. For example, I personally find the VNWA software to be less than intuitive, and the initial sound card