Author Topic: Crossed Parallel Loop Antenna  (Read 306 times)

ChrisSmolinski

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Crossed Parallel Loop Antenna
« on: November 28, 2017, 1926 UTC »
My latest antenna, construction details here: http://www.radiohobbyist.org/blog/?p=2340


Chris Smolinski
Westminster, MD
eQSLs appreciated! Send to: csmolinski@blackcatsystems.com
JRC-NRD 545 / RF Space netSDR / 670 ft horizontal loop / 500 ft beverage / 43mb sloping folded dipole / Crossed Parallel Loop

ChrisSmolinski

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Re: Crossed Parallel Loop Antenna
« Reply #1 on: December 04, 2017, 1319 UTC »
A short update.  I've been getting really nice results with this antenna. It does a great job on the LW and lower end of the MW band, where the sky loop is too short (even though it is 670 ft in perimeter). Also seems to do better on the higher end of HF, where the sky loop might be too many wavelengths long.

I asked LZ1AQ, who made the amplifier I use and came up with this antenna design, if putting a second set of loops in parallel would provide any significant improvement. He estimated perhaps a 10% increase in signal, and no improvement in signal to noise ratio, and said it was not worth doing. Sounds good to me!
Chris Smolinski
Westminster, MD
eQSLs appreciated! Send to: csmolinski@blackcatsystems.com
JRC-NRD 545 / RF Space netSDR / 670 ft horizontal loop / 500 ft beverage / 43mb sloping folded dipole / Crossed Parallel Loop

Finman

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Re: Crossed Parallel Loop Antenna
« Reply #2 on: December 04, 2017, 1801 UTC »
Nice looking loop there Chris!. Can you rotate it remotely?

ChrisSmolinski

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Re: Crossed Parallel Loop Antenna
« Reply #3 on: December 04, 2017, 1822 UTC »
Yes I can, although I have no feedback as to the orientation, I can just rotate it CW and CCW. And hope I remember how far I have done so in each direction, so I don't wrap coax around the mast.
Chris Smolinski
Westminster, MD
eQSLs appreciated! Send to: csmolinski@blackcatsystems.com
JRC-NRD 545 / RF Space netSDR / 670 ft horizontal loop / 500 ft beverage / 43mb sloping folded dipole / Crossed Parallel Loop

Josh

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Re: Crossed Parallel Loop Antenna
« Reply #4 on: December 04, 2017, 1840 UTC »
The antenna itself reminds me of a fractal.