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Author Topic: Some more LoG (Loop on Ground) results  (Read 508 times)

Offline ChrisSmolinski

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Some more LoG (Loop on Ground) results
« on: December 13, 2018, 1315 UTC »
I decoded 40 meter WSPR last night on my KiwiSDR, from 2300-1300 UTC this morning. This is with the 350 foot LoG antenna. Pretty decent results. My next step is to build a smaller LoG again, keeping the larger one, and compare results, especially on the higher bands.

« Last Edit: December 13, 2018, 1332 UTC by ChrisSmolinski »
Chris Smolinski
Westminster, MD
eQSLs appreciated! csmolinski@blackcatsystems.com
NRD 545 / netSDR / AFE822x / AirSpy HF+ / KiwiSDR / 670 ft horizontal loop / 500 ft northeast beverage / 270 ft west-south-west beverage / 300 ft south beverage / 43m / 20m / 10m  dipoles / Crossed Parallel Loop

Offline refmo

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Re: Some more LoG (Loop on Ground) results
« Reply #1 on: December 13, 2018, 2246 UTC »
Several nice catches there.  ZB2BU runs 200mw to a 30' wire, on top of the Rock of Gilbraltar.
Looking forward to seeing results with the smaller loop.
central Kentucky
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Offline Josh

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Re: Some more LoG (Loop on Ground) results
« Reply #2 on: December 13, 2018, 2250 UTC »
Is this thing a circular loop, or are you altering the layout to exhibit some directionality? Some log writeups say they lay the wire out in a "dual diamond" config or whatever it is.
Conveniently located near Vincennes Indiana.

Offline ChrisSmolinski

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Re: Some more LoG (Loop on Ground) results
« Reply #3 on: December 14, 2018, 1118 UTC »
The 350 ft loop is an irregular rectangle in shape. Time permitting I am going to re-lay it out as a square to increase the cross sectional area.

I set up the smaller loop yesterday afternoon, it is roughly a square 12.5 foot on a side. I made it with a 50 ft section of coax, using the shield, hoping the lower inductance of the large diameter shield vs #16 wire will help.  By the time I got it done, the higher bands were starting to close already, but some quick tests showed it generally produced stronger signals on 25 meters and up, vs the larger loop, which seems reasonable.
Chris Smolinski
Westminster, MD
eQSLs appreciated! csmolinski@blackcatsystems.com
NRD 545 / netSDR / AFE822x / AirSpy HF+ / KiwiSDR / 670 ft horizontal loop / 500 ft northeast beverage / 270 ft west-south-west beverage / 300 ft south beverage / 43m / 20m / 10m  dipoles / Crossed Parallel Loop

Offline ultravista

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Re: Some more LoG (Loop on Ground) results
« Reply #4 on: December 24, 2018, 0141 UTC »
Are either loops amplified or run straight to the radio?

Offline ChrisSmolinski

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Re: Some more LoG (Loop on Ground) results
« Reply #5 on: December 24, 2018, 1509 UTC »
Straight into the radio (though matching transformers), no amplifiers.
Chris Smolinski
Westminster, MD
eQSLs appreciated! csmolinski@blackcatsystems.com
NRD 545 / netSDR / AFE822x / AirSpy HF+ / KiwiSDR / 670 ft horizontal loop / 500 ft northeast beverage / 270 ft west-south-west beverage / 300 ft south beverage / 43m / 20m / 10m  dipoles / Crossed Parallel Loop