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Date : 1728010194225 - unknown on Apple WebKit
Mystery text : MHF3RmpGSVFjYjggaSAgbG92ICB1IGV1LXByb3h5LnBva2V0dWJlLmZ1bg==
143 : true
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#hamradio #amateurradio #sota
Thanks! 73 Richard G3CWI
Key words: ham radio, portable amateur radio, QRP, KX2, low power, antennas, HF radio, Richard Newstead, G3CWI, Radio Adventures, radio reviews, portable antenna, portable aerial, telescopic mast, telescopic pole, dipole, SW3B, VHF FM
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Uploaded At Mar 8, 2022 ^^
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RYD date created : 2023-11-01T14:58:29.828899Z
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YouTube Comments - 19 Comments
Top Comments of this video!! :3
The #1 thing I have learned about antennas in my 20 year and counting amateur radio career is that physics is NOT your friend. You are correct, Richard, yet one more reason why I love simple wire antennas so much.
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I thought the same, but I think, other than resonant metal structures, every thing is effectively transparent to hf. On both 20m and 40m international DX contacts sometimes to the opposite side of the world it must have a low take off angle and hence pass through the brick fence , house, trees and vegetation that surrounds my antenna. Also with a horizontal dipole I don't have the horizontal space to put up a decent antenna or place it up high. I have a 40m half wave horizontal "corner" dipole. Ie goes 10m in two directions 90 degrees apart from the feed point. And only slightly more than 2m off the ground. Mostly for nvis. VK6MIK
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Hi Richard,
I've been playing around with two vertical antennas, one is mounted on the ground with lots of radials and works great for around EU the other is a 1/4 wave for 20 mounted 3 meters agl with 3 counterpoises. I was fortunate to work VK3DBD this morning on both antennas. The ground mounted antenna yielded an rst 319 and the elevated 1/4 wave got 449.
I also put out a few CQ's and checked reverse beacon, the elevated antenna has the edge at this qth but not much between them when working nearer stations like Italy, Germany Poland etc.
I agree, a lot has to do with location and whats around the antenna. You are spot on, some will dissagree though!
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Good point Richard. I suppose one alternative for the average garden might be a vertical end fed dipole. Should still give good low angle radiation with the radiating element well above average hedge height.
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I have a 6BTV (with 12/17/60M add ons) ground mounted and aside from 40M, it out performs my EFHW8010 that is in an inverted L that goes up 50 feet then straight forward, as far as DX. I have 1000 feet of radials of various lengths for a total of 55 radials. My vertical gets a good 25 to 35% farther distance (according to WISPR) than the EFHW that is nearly twice as high up. Of course, every antenna and installation location is different, so your mileage may vary, some assembly required, batteries not included. π
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15 is not the norm I don't think, but my 40m vertical on the ground has always out performed my dipole at any height, that's if you want to get qso's on the other side of the planet and not locals.
I rarely qso anyone within the first 3000 miles on my vert. Zl to uk on 80m and 40m most days is easy.
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Interesting, my 6btv is firmly fixed to the ground whilst the EFHW goes right over the QTH at about 10 meters high, never thought about the actual path/takeoff angle on the 6btv, but seeing this video does make it clear the difference a ground mounted vertical and raised end-fed antenna. Good stuff.
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Excellent advice!
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Food for thought ππ
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Metallic roof + vertical on it
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If someone sets up a ham radio 15 km away from each other can they connect anywhere without a antenna
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My vertical with 60 50 ft radials radiates closer to 30 degrees than 15. Why did you choose 15? I've never owned a vertical with that low of a take off angle.
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I have always seen them laying on the ground and extended out. Like on the comet command antenna. Man..... unless you live on a farm this would be a nuance and a eye soar. Best just go with end fed 1/2 wave like the chameleon or similar. New to the HF world just got a X6100 QRP a couple days ago and doing research before I made a decision. Thank you for the info appreciate it.....
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radio waves this low go thru this obstacles so your theory doesnt add 7'3
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@MrScotchpie
10 months ago
Loved my vertical. With a garden there was no way I could fit a long wire. I've now just managed to squeeze in an inverted L running diagonally across the garden. There is only one rule when it comes to antennas. Put up whatever will fit.
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