An 80 meter dipole is closer to 62 feet on both sides. I've gone though a lot of antenna testing, homemade and commercial. Verticals, dipoles, NVIS, off-center fed dipole, mag loops. Excluding towers and beam antennas, the best inexpensive antenna I've used for both home an portable operations is a 49:1 end fed for 10-80 meters. They are pretty efficient, multi-band and if made well you don't even need a tuner. They can be setup many different ways including NVIS. You can build one from scratch for about $20.
@@spqa2004 gnarc.org/wp-content/uploads/The-End-Fed-Half-Wave-Antenna.pdf Page 11 has the diagram and part numbers. Steve Ellington on youtube is a good source as well czcams.com/users/n4lqsearch?query=endfed
Nick, can you do a video on the type of antenna Morgan and the gang used that they just threw up in a tree? I'm totally interested in that and how it looks.
Interesting video, might have to build one and test it out... I like an end fed dipole setup with a 9:1 unun. rolls up into a small package and tunes really well down through 40m. 73. KJ7AVR.
the SINCARS radio the military used to use started at 30 MHz to 54MHz for transmit functions, well above the MUF for NVIS. They DO tie the whips to prevent injury to personnel, and reduce identifiable signature appearance by not having a 3/4"x9' long fiberglass whip sticking up like a sore thumb, NOT TO PROMOTE HIGH ANGLE RADIATIONS. Yes, the folding over of the whip has the un-intended side affect of changing the radiation (and reception) lobe of the antenna, making it worse for LOS comms over the near scope battlefield. Because of this, the military now uses VHF/UHF Encrypted trunking comsnet with auto repeaters much like the trunked radios law enforcement now use. The added benefit of this is to not have to deploy a soldier as a stand alone repeater at a hilltop, simply fly a drone with a repeater enabled radio onboard and coms are good.... otherwise, great info on the NVIS antenna build, and kudos👍 Despite my fond memories of being a tank crewman, I don't miss the military!
The 'theory' you're building from, and making this video about, are wonderful antenna ideas. Some of the 'facts' are a bit suspect though. not meaning to bash the video, but the title is "...NVIS Antennas for 20m and 80m...". 20m isn't typically used on NVIS and you don't mention 20. You mention 40m and 80m. And 3000 miles, on VERTICAL radiation? I've never seen ANY documentation on that kind of range on NVIS. That would virtually be from Anchorage to Dallas (3021mi.). If this were the case, there'd be little reason to change antennas when attempting DX, making an NVIS antenna a damn good 'low angle' radiant antenna. Which argues in the face of what NVIS is supposed to do, cover that 'skipped area' a low angle radiator misses. The information I've seen, over decades, is up to '400 mi', never '3000'. Btw, those connections you can't seem to name are PL259 (male) and SO239 (female) Again, NOT trying to bash the video. I commend anyone willing to put themselves out there and do the work to make videos. But the information is out there (this is the internet) to get details properly prepared and correct before posting those videos (annotations to correct errors, if you don't feel like reshooting/editing).
Yeah, NVIS is usually 400 miles, 600 tops. Otherwise, you want side angle radiation for longer, and 3000 miles is low angle radiation off a vertical or dipole a half wavelength high or more. 40m might even be pushing it for straight up stuff too, depending in the critical frequency and actual angle used.....and 20m must have been a typo as rarely is the MUF above 10MHz.
my first antenna build was 2m out of a coat hook to put up at my house :-) You could build a beam for 2m SSB operations and a wire J-pole for throwing up a tree etc like Morgan does in the book for better range
An 80 meter dipole is closer to 62 feet on both sides. I've gone though a lot of antenna testing, homemade and commercial. Verticals, dipoles, NVIS, off-center fed dipole, mag loops. Excluding towers and beam antennas, the best inexpensive antenna I've used for both home an portable operations is a 49:1 end fed for 10-80 meters. They are pretty efficient, multi-band and if made well you don't even need a tuner. They can be setup many different ways including NVIS. You can build one from scratch for about $20.
Could you provide a link to instructions on this antenna?
@@spqa2004 gnarc.org/wp-content/uploads/The-End-Fed-Half-Wave-Antenna.pdf Page 11 has the diagram and part numbers. Steve Ellington on youtube is a good source as well czcams.com/users/n4lqsearch?query=endfed
Nick, can you do a video on the type of antenna Morgan and the gang used that they just threw up in a tree? I'm totally interested in that and how it looks.
Interesting video, might have to build one and test it out... I like an end fed dipole setup with a 9:1 unun. rolls up into a small package and tunes really well down through 40m. 73. KJ7AVR.
the SINCARS radio the military used to use started at 30 MHz to 54MHz for transmit functions, well above the MUF for NVIS. They DO tie the whips to prevent injury to personnel, and reduce identifiable signature appearance by not having a 3/4"x9' long fiberglass whip sticking up like a sore thumb, NOT TO PROMOTE HIGH ANGLE RADIATIONS. Yes, the folding over of the whip has the un-intended side affect of changing the radiation (and reception) lobe of the antenna, making it worse for LOS comms over the near scope battlefield.
Because of this, the military now uses VHF/UHF Encrypted trunking comsnet with auto repeaters much like the trunked radios law enforcement now use. The added benefit of this is to not have to deploy a soldier as a stand alone repeater at a hilltop, simply fly a drone with a repeater enabled radio onboard and coms are good....
otherwise, great info on the NVIS antenna build, and kudos👍 Despite my fond memories of being a tank crewman, I don't miss the military!
Keep the ham vids coming 73!
AAR6UK appears to be a MARS callsign
The 'theory' you're building from, and making this video about, are wonderful antenna ideas. Some of the 'facts' are a bit suspect though.
not meaning to bash the video, but the title is "...NVIS Antennas for 20m and 80m...". 20m isn't typically used on NVIS and you don't mention 20. You mention 40m and 80m.
And 3000 miles, on VERTICAL radiation? I've never seen ANY documentation on that kind of range on NVIS. That would virtually be from Anchorage to Dallas (3021mi.). If this were the case, there'd be little reason to change antennas when attempting DX, making an NVIS antenna a damn good 'low angle' radiant antenna. Which argues in the face of what NVIS is supposed to do, cover that 'skipped area' a low angle radiator misses. The information I've seen, over decades, is up to '400 mi', never '3000'.
Btw, those connections you can't seem to name are PL259 (male) and SO239 (female)
Again, NOT trying to bash the video. I commend anyone willing to put themselves out there and do the work to make videos. But the information is out there (this is the internet) to get details properly prepared and correct before posting those videos (annotations to correct errors, if you don't feel like reshooting/editing).
typo by the editors
Yeah, NVIS is usually 400 miles, 600 tops. Otherwise, you want side angle radiation for longer, and 3000 miles is low angle radiation off a vertical or dipole a half wavelength high or more. 40m might even be pushing it for straight up stuff too, depending in the critical frequency and actual angle used.....and 20m must have been a typo as rarely is the MUF above 10MHz.
Your links are broken, do you have the location of the docs?
That video is almost four years old and was published long before we acquired Survival Dispatch.
Interesting Informative OUTSTANDING
thnxs for uploading links 2 articles
👍🏻🇺🇸
THANK YOU KE5SRB
Terrific intel. 73. W9OLO
How about a video on making an antenna for a beofang?
They can be bought for 5 dollars
my first antenna build was 2m out of a coat hook to put up at my house :-)
You could build a beam for 2m SSB operations and a wire J-pole for throwing up a tree etc like Morgan does in the book for better range