The Truth About Magnetic Loop Antennas - MYTH BUSTING!

Comments · 96

• JO

  @johnwest7993 · 3 years ago

  This is very interesting, and mostly accurate. But I don't think a solid loop material will change much over a tube material because of skin effect. The losses are resistive, but only sort of DC resistive. The resistance can only be thought of as a DC resistance for a loop with less available material through which to conduct the current as frequency goes up.

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• DA

  @DaninVirginia · 2 years ago

  I really appreciate the presenter's sense of humor!

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• FO

  @fotografm · 3 years ago

  Excellent presentation !!! Thank you 🙂

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• RE

  @reedreamer9518 · 2 years ago

  What software did VK5KLT use for that variable graph?

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• RO

  @RobbieLimerickIreland · 3 years ago

  Always considered getting a loop, perhaps the Italian Commercial option, Midi Loop.

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• AE

  @aeron-mw7ofs · 3 years ago

  Very interesting, cheers Hayden 🍻👍

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• TH

  @TheSignalLabs · 1 year ago

  I have a Mazzoni midi loop with 100W

• PO

  @poorman-trending · 9 months ago (edited)

  Great video. In practice the resistance of your solder joints and even using aluminum instead of copper, it really doesn’t make much of a Noticeable difference as long as the radius of the conductor is chosen correctly.  Most commercial antennas get the diameter wrong btw.

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• NA

  @NamasenITN · 3 years ago

  A bit difficult to follow for me, due to the presentation style and the format. Th first slide was a good reference to read independently.

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• IZ

  @izzzzzz6 · 2 years ago

  I was trying to calculate a loop the other day to help combat terrible rfi. <br> &nbsp;I was wondering if I could feed it with a 9:1 balun and if so then would the loops tuning network be less necessary? I was thinking a simple capacitor like a flat piece of aluminium at the top open end of a flat aluminium loop, while keeping the point of capacitance central the idea is to slide an overlapping piece over and above the main top section of loop, adding capacitance the more it overhangs the top section. Regarding the matching to inductance with a bar or smaller fed loop it cam to me that if your feeding a smaller loop you can add some variables by orientating the smaller loop like a clock and then clamping it back down, in other words the feed point on the smaller loop, rather than it being at 12 o clock, you could loosen a bracket and move the feed point towards 9 o clock or towards 3 o clock for tuning then clamp it back down. Then I thought, might as well add another variable and make that clamping point be able to clamp to different points of the main loop, so either clamping slightly up towards 8 o clock or sliding it up towards 4 o clock for further adjustments. <br> &nbsp;The calculator told me that my design would have an Inductive Reactance: 465 ohms<br>This is why I was thinking to have a 9:1 balun to feed it with.<br> &nbsp;Regarding diameter i have seen that large diameter works better but then the flat sheet metal loop also looked interesting. I was wondering how making the flat aluminium much deeper would effect the loop. <br> &nbsp;The idea is to have a batter signal to noise ratio as we have noise around S7 S8 at times.<br> &nbsp;No chance getting the French electrical provider to come out and change the transformers. <br>It&apos;s hard to know if it&apos;s a transformer. I found a very noisy one but we only live around 3 miles from a hydro electric plant. I&apos;m wondering if they have noisy generators and then that noise comes down the power lines to us only to be re-transmitted by all of the power lines. I need to do some more walking but an area of around 10 Km square where I live is extremely noisy. I&apos;ve driven around and the noise keeps cropping up all over the place. If I drive to other villages then they do not suffer the same noise. However, driving around in general the noise is apparent in many other places.<br> &nbsp;I was also wondering if it could be the noise from all the smart meters sending data back down the lines.<br> I&apos;m at whits end and my friend who lives around 10-15km from here is suffering also. Possibly more than me but I think my radio has better filters than his. Tried noise cancellers like the VK5 but they only reduce noise with the gain down quite low, this is ok but it&apos;s not really enough. Next is current baluns and or 1:1 unun&apos;s then as many ferrite beads as possible on coax and all cables. I have a sound cancelling box also but i&apos;ve not tried it yet.<br> &nbsp;Thinking that selling the house is the only option.

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• PO

  @poorman-trending · 9 months ago

  Square loops work fine as long as the overall area is the same. circular vs square loop with the same area negligible difference.

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• PE

  @petertyrrell6690 · 2 years ago

  Great information. Thank you.<br>It is enough for me to understand that my Mag loop is going not be optimal with &quot;any old&quot; capacitor, (limits power) and to keep my connections and as low resistance as possible.<br>If I insist on building an optimal mag loop, I&apos;ll never build one.