I used a discone antenna on 2M back in the '70s. I made it from hardware cloth and coat hanger wire. It worked quite well. If I remember the J-pole antenna I made from copper pipe did work a bit better, but it didn't work on higher frequencies like the discone did.
Great to see someone building. May have to try that one. And that must be the most popular ARRL antenna book ever produced, everyone seems to have one (I do too). 73 73
Weird, I was going through my great aunts things and found this book. It was my great grandfathers. He was a HAM and his son, my grandfather, told me all about it, which made me get my license.
Nice to see the Smith graph circling the 50ohm point. A VNA really is a great tool for antenna analysis. You should build an up-scaled version so we can see how wide band it really is
Awesome!!! Sweet... I have some wooden dowels I started wrapping with aluminum duct tape to make an element style discone since have been amazed what that material alone can do and of course the discone design also. I have a ~450MHz Yagi instructable where I copied a Chinese design that like with the other projects... will focus on more this winter season. I do like the copper as the driven element however like my instinct. Amazed at the conductive and non conductive adhesive copper foil also. I have some Goodwill Store ski poles in the works also and a telescopic monopole so far with the ski pole first section, a carbon fiber graphite second section that was a dummy load ~49ohm so wrapped with non-conducive adhesive aluminum duct tape and then soldered a threaded tip for the typical telescopic AM/FM radio antenna. Neat! You know, I'll note here also since is another idea I'm planning to try some day like with a screwdriver antenna, and even better the finger style Scorpion motor driven tuneable design, to make an even more wider band and improved performance discone... is the fractal wrap for the monopole. I suppose if the individual elements can benefit also the sleeves, that will help performance. About the time 4:08 is the covering I'm thinking about and wondering what is the design exactly: ruclips.net/video/QWd0nEXFnrE/видео.html Wondering if like a pancake layered in a Yagi paradigm of thinking or what for the sheet discone design? Totally good stuff! Thanks for sharing!
Very impressive discone :-) I've always wanted a nice broadband antenna but when I model a discone designed for 110 MHz and up using EZnec, the first 50 MHz looks great, but above that the angle of radiation only works for aircraft and satellites. Gain to the horizon is very poor.
Neat! Impressive performance. You have a good amount of mechanical aptitude, so my thinking is that you weren't too confident in the design, but you gave it a go, anyway. You didn't even smooth the foil down : ) In fact it overlaps. I'm wondering if the performance might be a bit better if were...a bit smoother, perhaps also without so much overlapping, perhaps made from copper tape, soldered together with no gaps in the seams. It could also be made from brass sheet, also soldered together to form a conical section. For a fancy one, a wooden form could be made, and it could be spun, though it would have to be annealed a few times in the drawing process to prevent work-hardening and subsequent cracking. I also wonder if there is an aluminum or copper funnel somewhere that....
@@IMSAIGuy , It's a disturbing thought that they might have given the Tinman a superior multi-band omnidirectional antenna design, after they rifled through the kitchen drawers, desperately trying to make mechanical man costume. LOL! Many CAD programs have an unroll surface for a truncated cone, to make full sized templates. If by some odd chance, if you don't have access to one, I could draw one up in Rhino, and post full-sized template for you. There might be online cone-maker resources, as well. I suppose that one could be drawn, too,
Thanks for the Video! I have a Diamond Discone on my roof, that is my main "communications" Antenna. I like it a lot, I get everything under the sun. I have a question tho. After taking a reading with my nanoVNA, The SWR is really good across the whole band, But in a few places they are really good. Like 1:1. But my question is what would the gain of this antenna be? And is Gain related to SWR? I understand that SWR is the interface between the antenna and the radio through the Coax. Thanks Mike K
@@IMSAIGuy What a great year :) Thank you for your response. I've managed to get the recent edition and I didn't find the discone antenna.... I'm looking forward from a set of your videos on antenna theory illustrated with the nanovna... ;)
I used a discone antenna on 2M back in the '70s. I made it from hardware cloth and coat hanger wire. It worked quite well. If I remember the J-pole antenna I made from copper pipe did work a bit better, but it didn't work on higher frequencies like the discone did.
Great to see someone building. May have to try that one. And that must be the most popular ARRL antenna book ever produced, everyone seems to have one (I do too). 73 73
Was looking for a video about discone antennas. Saw your video pop up, also saw the book.... Like both things.
Weird, I was going through my great aunts things and found this book. It was my great grandfathers. He was a HAM and his son, my grandfather, told me all about it, which made me get my license.
Nice to see the Smith graph circling the 50ohm point. A VNA really is a great tool for antenna analysis.
You should build an up-scaled version so we can see how wide band it really is
Bought one last year for my scanner. Leaves a bit to be desired on 10-6m, but works good for > 100 mHz VHF & UHF.
Awesome!!! Sweet... I have some wooden dowels I started wrapping with aluminum duct tape to make an element style discone since have been amazed what that material alone can do and of course the discone design also. I have a ~450MHz Yagi instructable where I copied a Chinese design that like with the other projects... will focus on more this winter season. I do like the copper as the driven element however like my instinct. Amazed at the conductive and non conductive adhesive copper foil also. I have some Goodwill Store ski poles in the works also and a telescopic monopole so far with the ski pole first section, a carbon fiber graphite second section that was a dummy load ~49ohm so wrapped with non-conducive adhesive aluminum duct tape and then soldered a threaded tip for the typical telescopic AM/FM radio antenna. Neat! You know, I'll note here also since is another idea I'm planning to try some day like with a screwdriver antenna, and even better the finger style Scorpion motor driven tuneable design, to make an even more wider band and improved performance discone... is the fractal wrap for the monopole. I suppose if the individual elements can benefit also the sleeves, that will help performance. About the time 4:08 is the covering I'm thinking about and wondering what is the design exactly: ruclips.net/video/QWd0nEXFnrE/видео.html Wondering if like a pancake layered in a Yagi paradigm of thinking or what for the sheet discone design? Totally good stuff! Thanks for sharing!
Very impressive discone :-) I've always wanted a nice broadband antenna but when I model a discone designed for 110 MHz and up using EZnec, the first 50 MHz looks great, but above that the angle of radiation only works for aircraft and satellites. Gain to the horizon is very poor.
Neat! Impressive performance. You have a good amount of mechanical aptitude, so my thinking is that you weren't too confident in the design, but you gave it a go, anyway. You didn't even smooth the foil down : ) In fact it overlaps.
I'm wondering if the performance might be a bit better if were...a bit smoother, perhaps also without so much overlapping, perhaps made from copper tape, soldered together with no gaps in the seams.
It could also be made from brass sheet, also soldered together to form a conical section. For a fancy one, a wooden form could be made, and it could be spun, though it would have to be annealed a few times in the drawing process to prevent work-hardening and subsequent cracking.
I also wonder if there is an aluminum or copper funnel somewhere that....
I think I saw one on the Wizard of OZ
@@IMSAIGuy , It's a disturbing thought that they might have given the Tinman a superior multi-band omnidirectional antenna design, after they rifled through the kitchen drawers, desperately trying to make mechanical man costume. LOL!
Many CAD programs have an unroll surface for a truncated cone, to make full sized templates. If by some odd chance, if you don't have access to one, I could draw one up in Rhino, and post full-sized template for you. There might be online cone-maker resources, as well. I suppose that one could be drawn, too,
@@BrendaEM just draw pacman.
@@IMSAIGuy bytechlab.com/2018/05/mostly-3d-printed-discone-antenna/
this good?
Thanks for the Video! I have a Diamond Discone on my roof, that is my main "communications" Antenna. I like it a lot, I get everything under the sun. I have a question tho. After taking a reading with my nanoVNA, The SWR is really good across the whole band, But in a few places they are really good. Like 1:1. But my question is what would the gain of this antenna be? And is Gain related to SWR? I understand that SWR is the interface between the antenna and the radio through the Coax. Thanks Mike K
Gain and SWR are not related
Can you be só kind and tell me the book year? Regards
1974 thirtieth edition.
@@IMSAIGuy What a great year :) Thank you for your response. I've managed to get the recent edition and I didn't find the discone antenna.... I'm looking forward from a set of your videos on antenna theory illustrated with the nanovna... ;)
$3.00 New. A steal.
24 dbm or 5g network antenna