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Author Topic: Fan dipole  (Read 617 times)

Matt285

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Fan dipole
« on: December 13, 2019, 1915 UTC »
Has anyone ever built an antenna with these measurements. Looks like it can be made with one side or two like a standard dipole-

Note: In the instruction box above, the last sentence refers to the long portion of the wires, not at the connection point to the coax feed line to the receiver. All wires are connected together at the connector center conductor wire!

(frequencies shown below are approximate shortwave band centers):

Wire 1  (LONGEST WIRE) 3.25 MHz (90 meter band) 09.75 MHz (31 meter band 3rd harmonic)
468 divided by 3.25 = 144' 0"

Wire 2  3.95 MHz (75 meter band) 11.85 MHz (25 meter band  3rd harmonic)
468 divided byi 3.95 = 118' 6"

Wire 3  5.10 MHz (60 meter band) 15.30 MHz (19 meter band  3rd harmonic)
468 divided by 5.10 = 91' 9"

Wire 4  (SHORTEST WIRE) 5.90 MHz (49 meter band) 17.70 MHz (16 meter band  3rd harmonic)


Offline Josh

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Re: Fan dipole
« Reply #1 on: December 13, 2019, 2316 UTC »
http://www.bcro.org/wp/wp-content/uploads/Fan-Dipole-pdf.pdf

http://www.hamuniverse.com/multidipole.html

Never been a fan of fans (lol), much rather just fill the same space with a single dipole and force feed it with a tuner.
We do not encourage any radio operations contrary to regulations.

 

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