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Tiny Magnetic Loop - Big DX 3 года назад


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Tiny Magnetic Loop - Big DX

I took the homebrew QRP 1 m diameter small transmitting loop out to a local summit for some fun and was surprised with some fantastic propagation, on 40 meter nonetheless. This was one of my first DX contacts on the band, and with a small compromise antenna and QRP power, nonetheless. Small transmitting loop antennas are relatively simple and fun to build. Here's a little helpful info to get you on the right path to building. https://www.66pacific.com/calculators... http://webclass.org/k5ijb/antennas/Sm... Also check out ‪@vk3ye‬'s videos here on YouTube - he has done lots of work with small transmitting loops. Here's the hardware I use to make the larger part of the loop. Pretty simple bar-stock aluminum folded out straight and then bent into a circle. Works great! 1/16" x 1/2" Flat Aluminum Bar: https://amzn.to/3trTdAX Mini project box: https://amzn.to/3h8FeNP 6-32 x 1/2" Stainless Screws: https://amzn.to/3tmqI7G 6-32 Nylock Nuts: https://amzn.to/33lLnyj #6 Flat Washer: https://amzn.to/3h9YJWy Feeding and matching a loop takes a bit of trial and error, and some specific electrical components - primarily variable and potentially also switched capacitors that can handle very high voltage and currents. Study up before you build to optimize your design. If there's interest, I can create some videos that go more into my strategy for building and matching these types of antennas. It's a fun build!

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