Going portable with the easy to build “Coastal 20” vertical no-radial multiband HF antenna for 20 through 10 meters #hamradio #hamradioantenna #verticalantenna
You do a nice job with your videos. My wife and I are new hams, and your videos are very helpful to me. Because you explain things well, I often mimic what you do, for example I bought a Xiegu G90 and I have purchased and am enjoying using several antennas which I have seen you use successfully. Thanks!
I love your channel. Fairly new ham now general and I have built a 70 cm, 2 meter, and 1.25 1/4 wave based off of your speaker wire, Banna clip, fishing pole design. They work awesome. My 2 meter hit a repeater over 20 miles away. The rubber duck could barley his the repeater 2 miles away. Absolutely amazing. Thank you!
Thanks Walt for this and built this yesterday on a 2/3 1/3 set up through a 4:1 balun to your dimensions but could not tune to 20m band (gave swr of 1.758 at 15.280) . Altered length to 24 feet with a 16 foot/8 foot ratio to be able to tune safely to 20m band Formula 468/f changed to 313 as a revised factor for calculation. No contacts yet on my G90 due to lots of qrm here in Scottish Borders UK. Will keep trying. Love experimenting with antennas..
Walt, great video my friend! I'm new to 10m and just picked up a IC705 to get me on... Still working to figure it all out but your videos have been a HUGE help in antenna building. Working on a vert now from one of your previous videos but also going to try this out too! Thanks again!
Ten meters is by far my favorite band to operate. It's been years since I've been on the air, and this simple antenna makes me want to dive back in. 73.
The various no radial verticals like the Cushcraft R-8,9 and R-6000 use the 36" lower portion with a 9:1 balun and the 1:1, same configuration. The other half feeding the balun is basically an off center fed vertical. They work very well.
Welcome back sir! I've been playing around with a half wave vertical based off ye olde 17ft telescopic whip. Theoretically it should work 6 thru 15 (and 20 with a coil like the sporty 40). So far I have 10-15 dialed in. The great part is I can mount the entire thing on the fender mount of the truck if need be!
Wow you really showed us this time what you can do in an unexpected (emergency) situation! Kudos on your "seat-of-the-pants" reaction to the challenge, and the effectiveness of your quick solution! This is very inspiring! Keep up the good work at sharing dear Walt, 73 de WA4NID
Nice job, Walt. I use something like it on a hitch mount on my pick up. It's an MFJ 33' telescoping pole. I went with a LDG 4:1 with around 22' of old speaker wire on top. Interestingly, it didn't seem to care about the counterpoise length either, and 4' to 7' worked equally well. I enjoy your videos. 73 de N6BVZ wil in north GA.
Sort of a T2LT type design - tipping a dipole on its end, except it's OCF. Interesting stuff. Building antennas can be fun. You have to deal with things physically and electrically. It can be challenging. Certainly going out and buying an expensive, pre-made HF antenna may be easier. But you learn more by studying antenna theory and getting out there and experimenting. I just put up 4 new antennas in my yard, which involved tuned, elevated radials for 2 of them. Learned so much about antennas.
Startled me when you started out saying you were in Portsmouth, VA. I have lived in Norfolk for over 50 years. Also I am one of those old fogeys that have had my license, WB4TKA, for over 45 years ( I think 🙂). We aren't all downers though and there are always people like you described in your other video. Great looking antenna, have to dig out one of my telescoping poles and try it out. Keep making interesting antennas, that is what I always liked the most, that and building radios and things. Subscribed to see what you come up with next.
Hi neighbor! Great to hear from another Hampton Roads ham! Thanks for subscribing and thanks for the encouragement. You’ve got some great spots to go portable over on your side of town. I’ve been going out on the beach in Ocean View occasionally and it’s perfect. All the best and 73, Walt K4OGO
This is truly a thing of beauty. Thanks for making the video. Now I know what to do with the space saver spare I have leftover from a long-ago-sold car!! 73, K7KS
@@COASTALWAVESWIRES While I have your attention, what would I search for for the 1:1 balun you used in the "build a dirt cheap speaker wire vertical antenna for HF" video? I can't seem to find it on my own, but I like it's packable form factor. Thanks!
Thanks for the video Walt , now I know what antenna I shall try and build on my newly acquired 10 telescopic pole , simple build is what we like you never know I could be having a QSL with yourself even . Thanks again Stuart Dowling M0KIQ
Hi Walt from the England/Scotland border. I like your tee-shirt ! That antenna is a great design and as I live on the coast of the Irish Sea, I will definitely be trying this. All the best, Pete
Hi Walt. I had my doubts but went ahead and built your Coastal 20 to spec and attached it to my 10m DXC pole. Within 2 minutes, my first contacts were stations in Pennsylvania, New Jersey and North Carolina from the coast of Oregon with 100 watts. Now I will try QRP. Thanks!
Nice antenna! Nice that you found celso again, he loves everything antenna. I started at the radio with him and the first antenna built was a L antenna. Basically an aluminum dipole L shaped. Celso’s hobby now is basically building yagis and cubical quad antennas heheh Ah the propagation has been crazy opened in a while, it’s just a matter of having hams calling cq. I challenge you to build a 1 element cubical quad! You’re gonna love it! 73!
I accept that challenge my friend! About to head back to Europe in a couple weeks for what might be the final tour of duty there. When I get home permanently the fun will begin. All the best André! 73 my friend!
@@COASTALWAVESWIRES Thanks for your reply - yes, I understand. I suppose all multiband antennas have to be a compromise in some way. I'll stick to your suggested measurements. 73 and thanks again.
Hey Walt, I built this antenna to use with my G90, and I love it! I live on a very small footprint, on the ocean in Maine. This works perfect for my property. Thanks for the build instructions. BTW, I gave you credit on my QRZ page. 73 Paul W1BIU
Love the Royal Navy T. My late father G4ZPV did 22 years in the Royal Navy, as a radio specialist, he lived near Portsmouth in the UK for the last ten years of his life. His first duty in the navy was as a gate guard ta the Naval Dockyard at Portsmouth. He was armed with a .303 lee enfield rifle, with no bolt and six Mills bombs. Currently re-building my station. 73 de CT7AOX.
Your DC input voltage was dropping to below 12 V on transmit. I use 3 of those 6AH Miady batteries in parallel to run 50 watts on my FT-891. They don't like high discharge currents. You had great signal strength both ways on that antenna.
Hi Walt, How's Poland? LOL, I am disabled due to a bad work situation that I was in, however I have been a Ham nut forever I had an extra get me my Tender foot with my first transmitter a smoldering 10 watt 1 tube CW with an old space patrol shortwave as receiver. Anyway I really enjoy your channel and your enthusiasm to the fraternity of amateur radio, I had an Elmer who sold me my first HF rig tell me antenna, antenna, antenna, and he and I would visit for hours about stringing up a wire or winding a balun, this all being said I thought I have got to ask Walt as you were one of the reasons I bought a Xiegu G90 for my primary qrp rig, so I don't have near the funds I used to but I try and be creative and work with what I have and I am really happy and impressed that you kinda roll like that as well. I have ran into a speed bump however and I thought maybe I could throw it out there to Walt and see if he has any ideas, I've never worked 40 much especially at a qrp angle, but I see what you have done with vertical wire on 20-10 I really like the concept, so I guess where I am is have you experimented with any thing 40m with the fishing pole and end fed wire that would be happy throughout the band and be happy with internal tuner and do amazing things with 4 watts, and not wipe out my bank account, Thanks Walt 73s I appreciate all of your sharing of info and the goodness of the hobby take care Walt, maybe we can catch each other in a call someday KC0KJG Mark
Hi Mark! Sorry to hear about your situation. Keep on hamming my friend! I’ve actually had some decent success with the Rybakov vertical on 40 with low power. I was actually surprised with it on 40 because it’s actually shorter than a 1/4 wave for the band. It’s roughly 25 feet long and uses a 4:1 unun. I’ve done a couple videos on it if you haven’t seen them check that out. That would honestly be my best recommendation for a pole type vertical for 40. I really need to get out and make a 1/4 wave for 40 with my 10 meter pole. You’ve got the wheels turning in my brain lol. Thanks so much for watching my videos, stay safe and well my friend. All the best, Walt K4OGO
Made this today. Given some issues with objects in the near field, I had to use a much longer counterpoise to get the SWR reasonable. Will get it on the air soon. 73 K3RDF
Great job and a nice save! I need to build this now. Seeing that the SWR is below 3:1 is good to know. Internal tuners, like on my 7300, should be able to handle that.
Dang it, Walt. I'm going to have to try another antenna. Haven't built my Rybakov yet, so now I get to debate which to do first. Seriously, though. Thanks for putting this out there. You're videos are an inspiration. 73 KO4QOA
I always enjoy your vids, Walt. I am hoping to do a POTA activation from Carolina Beach State Park with a Xiegu G90 and an Eagle One vertical antenna. I would like to work you on the air, ocean to ocean. Have fun!
Love the videos Walt! I've become an aspiring antenna geek from watching your vids. I live in the deserts of Arizona and am SO JEALOUS of your location by the magic of the Salty Sea. I recently was on vacation in Savana GA and packed my FX-4CR, some wire and 7m mast but forgot a tape measure, I estimated the lengths of your costal 20 and set out for the beach. I had some amazing DX action, in fact, I was getting into Europe better than the eastern seaboard of the US! When I got back home I found my measurements were off by quite a bit and the antenna was fairly deaf in the desert. Again, So Jealous! Anyway I have a trip to Hawaii coming up and I"m going to bring my tape measure! Thanks for doing what you're doing Walt - 73 KK7JXG
I had dropped you a link on that type of configuration from another ham who had some the modeling and math but it looks like it didn't get approved. Lots of insight for you on that excellent setup. Oh well, take care brother!
Amazon has some solid steel rod holders. Basically a steel spike that's coiled to hold your rod on one end. Been sitting in my shopping cart waiting for my rod (antenna mast) to show up from Japan.
Thanks for this low budged hf antenna, .i live near the Nort sea in north west Holland 80 km north off Amsterdam The antenna works verry well, 73s PA3DTQ
Thanks for another great antenna video Walt. I am currently struggling with my HF setup. I have a TennTennas EFHW that worked great at the beginning of the year, but has slowly gone deaf over the summer. I would like to put up a simple Harvest Taurus vertical in the front yard before winter (about 4 weeks away) but my wife really doesn't want the vertical right out in the front yard. A compromise that we came up with is a flag pole. I am looking at fiberglass flagpoles and I think this might be the perfect antenna to hang on the side of the antenna. This would be a "permanent" setup, so I need to figure out how to install and protect the unun and choke from the weather. Again, I think this may be exactly what I am looking for. Thanks again!
@@COASTALWAVESWIRES I watched your video on yours and that is what made me think about getting one. A buddy of mine has that exact antenna and he let me borrow it for a few days. With nothing more than a metal fence post, a 10 foot mast, a bungee cord and that Harvest Taurus, I was making DX contacts all of Europe. It is definitely big value at a good price. I may end up with that versus the flag pole and wire antenna. We'll see. I appreciate your content. As you can see you are helping out other Hams with the content you provide. 73
Thanks Walt for another good video! Why not use a 3 ft section of coax jumper between the 9:1 and Choke and use the jumper as your counterpoise, to make setup easier? Also a longer jumper between them could be used, laying across the ground to your rig, letting it decouple a bit to ground. Just a thought. 73 mike
On your antenna is the short wire connected to the shield of the coax? I'd like to give that design a try after I get a mast. I was working my G90 here in Michigan at 20 watts and a 9:1 random wire during the same time period and made several of the same contacts. I also got to California (1911 miles -weakly) and Herzegovina (4691miles) my longest QSO ever! Pretty good for no radials and no salt water. Like you Walt I wasn't expecting much. Every one on 20 meters was complaining about conditions but I found 10 and 15 to be excellent.
Hi Jeff, yes the short wire is basically connected to the shield side of the coax which as you know is the (-) negative post on the 9:1 unun. I hear a lot of guys in Michigan talking to Australia on Saturday mornings around 8 am EDT. Checkout 20 meters around 14.240 this Saturday around that time, you might have a new longest QSO. That setup should make the trip. All the best and 73!
Nice work, I’ll be cutting wire and trying that soon. BTW..I was wrong about which Rush song that your son’s band intro reminded me of. It’s actually called “Afterimage”. 73
👍Thanks for sharing. Could it be described as a vertical OCF-doublet?? The overall length of 20.5ft or 6 25m would make it a halfwave dipole on 12.5m. Does this explain the lower VSWR on 15/12m? It certainly works and seems like a good small footprint multiband antenna idea. Mission accomplished 😊.
Hi Walt, looks like another great day near the water for sure. I saw a previous iteration of this setup where your drawing showed the bottom 1 meter element beginning 3 feet above the ground. This version appeared to be down near the ground. Propagation conditions aside which version worked better for you? Being adjacent to the water being a factor I am sure. Thanks for another neat video and effort. 73 N4LWT
That’s a great question, as you can see in the video my original intention was to get it up a meter off the ground. It worked well lower but I’m thinking higher is better. Need to do some more experimenting and I’m also going to model it and see what the data says. Thanks for the kind words! All the best and 73, Walt
This might be what the shakespeare 390 is.... I find it strange that the feed is about 18in up on the antenna. Maybe its just to create some distance from the base that might be connected to a stainless rail or something. No idea. Hope to hear advice on my marine setup though. Need to figure out how to tie my ocean counter poise into my setup. Do I use a 1:1 balun? So many noise sources to deal with... solar, refrigerators, chart plotters vhf etc etc... all tied to same 12v system. Im in Annapolis and Virginia for the next couple months. Let me know if you want to get a beer. Cheers
I would say just get a wire connected to a through-hull metal fitting near the waterline and up to braided ground side of the coax and you have a perfect setup. Just needs to be at the waterline.
Those SWR sweeps looked nice and flat. Seems like even using a rig without a built-in tuner, a simple manual tuner could be adjusted once on a band and left alone. You could probably even just write down the settings and use them again the next time you go out.
The 9:1 unun is for the impedance match at the feed point of the antenna and the 1:1 balun is a choke to keep all the energy in the antenna and keep common mode current out of the feed line (basically prevents the coax from becoming part of the antenna).
Hi, I made the antenna this afternoon and it worked very well……especially on bands above 20m. Can you let me know how you derived the wire lengths as I’m somewhat curious? I helically wound the top section on a 6m pole. Love your work. de VK3AWA
Hi Daryl, I came up with those lengths as they are also not resonate at any multiples of frequencies I used if that makes sense. I showed a graph of random wire lengths in the first video I did on this antenna if that helps. All the best mate!
I wonder how a variation of this would work, using one metre of the coax between the unun and the CMC filter with the outer braid instead of the lower section? Looks like I'll have to make one to find out! VK4BOB
I found a much more substantial surf rod holder at Bass Pro Shops - larger spacing between the bolt holes, next larger size aluminum angle. It is big enough for my Carbon 6.
As said on last 17-5 I am still learning. To which terminal is the 3 foot extra wire attached and which the counterpoise please. The images were a bit quick for me to be sure. I think that I know, but checking. Thank you Walt. Phil Suffolk U.K. 🇬🇧
@@FIL357 the 3 foot extra wire is the counterpoise and is attached to the ground (-) black side terminal of the unun. The longer upper (driven element) attaches to the positive (+) side of the unun. 73, Walt
@@COASTALWAVESWIRES Thank you Walt, as I thought. It’s very kind of you to reply so rapidly. I’ve made a few wire antennas. - Some have been ok, some not so good!😫 Hope to have a QSO at some point of time hence. Best regards, phil. g0nik
Cannot wait until UK allows 20w on hf radio as per recent recommendations. Cannot progress further on my licence due to effects of strokes so 20w will be more than welcome. Building this at the weekend in advance of 20w permission.
Nice one Walt, just thinking and probably getting it wrong 😁 isn't a Carolina windom a off centre dipole I think this antenna uses a 4:1 balun have you any thoughts on this, and trying a 4:1 balun instead of your 1:1 balun. it's also international Marconi day Saturday 22 April are you going to play radio this weekend, thanks for the video Walt, Adam G7CRQ
Hi Adam, yes the Carolina Windom which is basically an off center fed dipole uses a 4:1, I actually experimented and tried a 4:1 with this at first and found the 9:1 worked better for this shorter antenna. I’m sure I will be on Saturday, it’s forecasted to rain here so I’ll probably just fire up the radio at home and play radio all day. 73 my friend!
You are modeling good radio manners as well. I am glad to see polite behavior around the world.
A really nice and incredibly simple idea for a camp day.
Thank you so much, Walt!
You do a nice job with your videos. My wife and I are new hams, and your videos are very helpful to me. Because you explain things well, I often mimic what you do, for example I bought a Xiegu G90 and I have purchased and am enjoying using several antennas which I have seen you use successfully. Thanks!
I love your channel. Fairly new ham now general and I have built a 70 cm, 2 meter, and 1.25 1/4 wave based off of your speaker wire, Banna clip, fishing pole design. They work awesome. My 2 meter hit a repeater over 20 miles away. The rubber duck could barley his the repeater 2 miles away. Absolutely amazing. Thank you!
Thanks Walt for this and built this yesterday on a 2/3 1/3 set up through a 4:1 balun to your dimensions but could not tune to 20m band (gave swr of 1.758 at 15.280) . Altered length to 24 feet with a 16 foot/8 foot ratio to be able to tune safely to 20m band Formula 468/f changed to 313 as a revised factor for calculation. No contacts yet on my G90 due to lots of qrm here in Scottish Borders UK. Will keep trying. Love experimenting with antennas..
Walt, great video my friend! I'm new to 10m and just picked up a IC705 to get me on... Still working to figure it all out but your videos have been a HUGE help in antenna building. Working on a vert now from one of your previous videos but also going to try this out too! Thanks again!
Thank you Anthony! Hope to catch you on the bands!
In a world full of big spenders (and power) you continue to show the way.
Thank you!!!!!
Ten meters is by far my favorite band to operate. It's been years since I've been on the air, and this simple antenna makes me want to dive back in. 73.
Ten has been great lately!
Hope you got back on the air. 73 M7XNR
As soon as I get some portable radio time I’m taking the Coastal 20 with serial number 002 out by the sea! Awesome video again Walt!
Thanks Morten! looking forward to it!
As usual fun paired with knowledge. Thanks Walt!
Thanks so much my friend!
I just found your channel yesterday. You have some very interesting videos. Thank you.
Thank you so very much!
The various no radial verticals like the Cushcraft R-8,9 and R-6000 use the 36" lower portion with a 9:1 balun and the 1:1, same configuration. The other half feeding the balun is basically an off center fed vertical. They work very well.
Interesting, thanks for sharing
Welcome back sir! I've been playing around with a half wave vertical based off ye olde 17ft telescopic whip. Theoretically it should work 6 thru 15 (and 20 with a coil like the sporty 40). So far I have 10-15 dialed in. The great part is I can mount the entire thing on the fender mount of the truck if need be!
Awesome!
Wow you really showed us this time what you can do in an unexpected (emergency) situation! Kudos on your "seat-of-the-pants" reaction to the challenge, and the effectiveness of your quick solution! This is very inspiring! Keep up the good work at sharing dear Walt, 73 de WA4NID
Thank you so much! 73, Walt
Nice job, Walt. I use something like it on a hitch mount on my pick up. It's an MFJ 33' telescoping pole. I went with a LDG 4:1 with around 22' of old speaker wire on top. Interestingly, it didn't seem to care about the counterpoise length either, and 4' to 7' worked equally well.
I enjoy your videos.
73 de N6BVZ wil in north GA.
Thank you so much! 73 de K4OGO
Sort of a T2LT type design - tipping a dipole on its end, except it's OCF. Interesting stuff. Building antennas can be fun. You have to deal with things physically and electrically. It can be challenging. Certainly going out and buying an expensive, pre-made HF antenna may be easier. But you learn more by studying antenna theory and getting out there and experimenting. I just put up 4 new antennas in my yard, which involved tuned, elevated radials for 2 of them. Learned so much about antennas.
Yes it’s all about experimenting and learning by doing. I think that’s the true spirit of ham radio. 73 de K4OGO
That was epic, Walt. I'm gonna have to try this antenna Very cool!
Thank you so much!
I use a 40' long wire ('random') and it's shocking how good they can be when conditions are reasonable. Great video.
Thanks! Yes I really enjoy tinkering with random lengths.
Startled me when you started out saying you were in Portsmouth, VA. I have lived in Norfolk for over 50 years. Also I am one of those old fogeys that have had my license, WB4TKA, for over 45 years ( I think 🙂). We aren't all downers though and there are always people like you described in your other video. Great looking antenna, have to dig out one of my telescoping poles and try it out. Keep making interesting antennas, that is what I always liked the most, that and building radios and things. Subscribed to see what you come up with next.
Hi neighbor! Great to hear from another Hampton Roads ham! Thanks for subscribing and thanks for the encouragement. You’ve got some great spots to go portable over on your side of town. I’ve been going out on the beach in Ocean View occasionally and it’s perfect. All the best and 73, Walt K4OGO
Nice one Walt, simple vertical of any description is always going to give you fun.
73.
Thanks Brian, you are absolutely correct my friend!
You are the champion of the "Cheap and Easy" - put it together with what ya have antennas. Great video.
Thank you so much Lew!
This is truly a thing of beauty. Thanks for making the video. Now I know what to do with the space saver spare I have leftover from a long-ago-sold car!! 73, K7KS
Thanks! 73, K4OGO
Makes me wish I lived near the coast! What a great antenna and great long contacts you made!
Thanks Levy! I’m blessed to live where I’m at for sure
@@COASTALWAVESWIRES While I have your attention, what would I search for for the 1:1 balun you used in the "build a dirt cheap speaker wire vertical antenna for HF" video? I can't seem to find it on my own, but I like it's packable form factor. Thanks!
Thanks for the video Walt , now I know what antenna I shall try and build on my newly acquired 10 telescopic pole , simple build is what we like you never know I could be having a QSL with yourself even .
Thanks again Stuart Dowling M0KIQ
Hope to get you in the log! 73, Walt
Hi Walt from the England/Scotland border. I like your tee-shirt ! That antenna is a great design and as I live on the coast of the Irish Sea, I will definitely be trying this. All the best, Pete
Hi Pete! I work in ship design and my company is currently working with your great navy! All the best and 73, Walt K4OGO
Hi Walt. I had my doubts but went ahead and built your Coastal 20 to spec and attached it to my 10m DXC pole. Within 2 minutes, my first contacts were stations in Pennsylvania, New Jersey and North Carolina from the coast of Oregon with 100 watts. Now I will try QRP. Thanks!
Awesome! thanks for sharing your results.
Nice reflexes catching your pole before it went into the water.
Haha I was like GI Joe with the Kung Fu grip when I saw the coax pulling my radio towards the water 😂
I use a close approximation to that antenna with a current balun and it tunes up really well and has decently low noise.
Nice antenna! Nice that you found celso again, he loves everything antenna. I started at the radio with him and the first antenna built was a L antenna. Basically an aluminum dipole L shaped.
Celso’s hobby now is basically building yagis and cubical quad antennas heheh
Ah the propagation has been crazy opened in a while, it’s just a matter of having hams calling cq.
I challenge you to build a 1 element cubical quad! You’re gonna love it!
73!
I accept that challenge my friend! About to head back to Europe in a couple weeks for what might be the final tour of duty there. When I get home permanently the fun will begin. All the best André! 73 my friend!
Great video, brilliantly explained. This antenna suits my situation perfectly! Building it as we speak and trying it tomorrow. Thanks for posting
73
Thanks! Good luck with the antenna!
@@COASTALWAVESWIRES Can you extend / shorten the elements to improve swr from local conditions?
@@languagetruthandlogic3556 I’m sure but I think you could lose one band by improving another
@@COASTALWAVESWIRES Thanks for your reply - yes, I understand. I suppose all multiband antennas have to be a compromise in some way. I'll stick to your suggested measurements. 73 and thanks again.
Hey Walt, I built this antenna to use with my G90, and I love it! I live on a very small footprint, on the ocean in Maine. This works perfect for my property. Thanks for the build instructions.
BTW, I gave you credit on my QRZ page.
73 Paul W1BIU
Awesome! Thanks so much! I'll go over and check out your QRZ page. 73, Walt
Love the Royal Navy T. My late father G4ZPV did 22 years in the Royal Navy, as a radio specialist, he lived near Portsmouth in the UK for the last ten years of his life. His first duty in the navy was as a gate guard ta the Naval Dockyard at Portsmouth. He was armed with a .303 lee enfield rifle, with no bolt and six Mills bombs. Currently re-building my station. 73 de CT7AOX.
God bless your father, that’s a great story. Thanks for sharing. 73 de K4OGO
Hey Walt. As always, great content. Ham radio doesn't have to be complicated nor expensive.
Thanks so much my friend!
Thanks Walt, Another one for me to try
Thanks for watching!
Your DC input voltage was dropping to below 12 V on transmit. I use 3 of those 6AH Miady batteries in parallel to run 50 watts on my FT-891. They don't like high discharge currents. You had great signal strength both ways on that antenna.
Hi Walt,
How's Poland? LOL, I am disabled due to a bad work situation that I was in, however I have been a Ham nut forever I had an extra get me my Tender foot with my first transmitter a smoldering 10 watt 1 tube CW with an old space patrol shortwave as receiver. Anyway I really enjoy your channel and your enthusiasm to the fraternity of amateur radio, I had an Elmer who sold me my first HF rig tell me antenna, antenna, antenna, and he and I would visit for hours about stringing up a wire or winding a balun, this all being said I thought I have got to ask Walt as you were one of the reasons I bought a Xiegu G90 for my primary qrp rig, so I don't have near the funds I used to but I try and be creative and work with what I have and I am really happy and impressed that you kinda roll like that as well. I have ran into a speed bump however and I thought maybe I could throw it out there to Walt and see if he has any ideas, I've never worked 40 much especially at a qrp angle, but I see what you have done with vertical wire on 20-10 I really like the concept, so I guess where I am is have you experimented with any thing 40m with the fishing pole and end fed wire that would be happy throughout the band and be happy with internal tuner and do amazing things with 4 watts, and not wipe out my bank account, Thanks Walt 73s I appreciate all of your sharing of info and the goodness of the hobby take care Walt, maybe we can catch each other in a call someday KC0KJG Mark
Hi Mark! Sorry to hear about your situation. Keep on hamming my friend! I’ve actually had some decent success with the Rybakov vertical on 40 with low power. I was actually surprised with it on 40 because it’s actually shorter than a 1/4 wave for the band. It’s roughly 25 feet long and uses a 4:1 unun. I’ve done a couple videos on it if you haven’t seen them check that out. That would honestly be my best recommendation for a pole type vertical for 40. I really need to get out and make a 1/4 wave for 40 with my 10 meter pole. You’ve got the wheels turning in my brain lol.
Thanks so much for watching my videos, stay safe and well my friend.
All the best, Walt K4OGO
Made this today. Given some issues with objects in the near field, I had to use a much longer counterpoise to get the SWR reasonable. Will get it on the air soon. 73 K3RDF
Awesome. I watch all your videos and you're just awesome. Great antenna design. I think I'll build one myself!
Thank you so much!
@@COASTALWAVESWIRES Walt, I hope to work you on the air some day. I also experiment with wire antennas.
@@vinnyboywo6571 absolutely, I look forward to that QSO!
Great job and a nice save! I need to build this now. Seeing that the SWR is below 3:1 is good to know. Internal tuners, like on my 7300, should be able to handle that.
Thanks! I’m looking forward to your experience if you build it!
Uncle Walter is just HAMing da Heck out of the Ionosphere. Excellent Job...💯🎙👌🙋♂
Hahaha thanks Uncle G!
Awesome video, Walt. I’m gonna make a Coastal 20 for my station in Delaware. See you on the radio waves! 73 de K3DHJ
Thanks! Good luck with the antenna! 73 de K4OGO
Great stuff Walt!!
Thanks Tim, this has been a fun experiment. Thanks for your input when I was dreaming it up!
Always looking for quickly deployed new wire antennas for POTA. Enjoy your content, Thank You.
Thanks for watching my channel Greg! 73, Walt K4OGO
Walt that was great ! A vertical without radials ! Well done ! 73's Bill KW4QO
Thank you Bill! 73 de K4OGO
Now ANOTHER antenna to make!!! :) TY Walt
haha thank you for watching!
Dang it, Walt. I'm going to have to try another antenna. Haven't built my Rybakov yet, so now I get to debate which to do first. Seriously, though. Thanks for putting this out there. You're videos are an inspiration. 73 KO4QOA
Thanks Warren! go with that Rybakov first, it's an amazing antenna!
Great stuff 👍
Thanks Aeron!
Coastal Waves & Wire Rocks!
Thank you!!!!!
Nice work Walt! That Xiegu G90 is surely working well for you. 73!
Thanks! I love that little radio. It almost went for a swim yesterday 😂
I always enjoy your vids, Walt. I am hoping to do a POTA activation from Carolina Beach State Park with a Xiegu G90 and an Eagle One vertical antenna. I would like to work you on the air, ocean to ocean. Have fun!
Looking forward to that QSO. Beach to beach, G90 to G90!!
Thanks for the video.
Thanks for watching!
Excellent!!!
Nice antenna, thank you for video, great experience
Thanks for watching!
What I hear on many contact videos, and my own listening of course is how having a yagi really helps.
Yes, Yagi antennas are amazing
Great stuff!
Thank you!
Now that just looks like good fun🎉🎉🎉😮😮
This reminds me a little of the Chameleon MPAS 2.0, but it uses a 5:1 and the choke built into the coax.
Interesting, thanks for sharing.
Love the videos Walt! I've become an aspiring antenna geek from watching your vids. I live in the deserts of Arizona and am SO JEALOUS of your location by the magic of the Salty Sea. I recently was on vacation in Savana GA and packed my FX-4CR, some wire and 7m mast but forgot a tape measure, I estimated the lengths of your costal 20 and set out for the beach. I had some amazing DX action, in fact, I was getting into Europe better than the eastern seaboard of the US! When I got back home I found my measurements were off by quite a bit and the antenna was fairly deaf in the desert. Again, So Jealous! Anyway I have a trip to Hawaii coming up and I"m going to bring my tape measure! Thanks for doing what you're doing Walt - 73 KK7JXG
You’re going to love operating in Hawaii, that’s awesome. I have done it in Kauai and I really want to go back. 73, Walt
I had dropped you a link on that type of configuration from another ham who had some the modeling and math but it looks like it didn't get approved. Lots of insight for you on that excellent setup. Oh well, take care brother!
Didn’t see that, not sure what happened
Amazon has some solid steel rod holders. Basically a steel spike that's coiled to hold your rod on one end. Been sitting in my shopping cart waiting for my rod (antenna mast) to show up from Japan.
Thanks, I'll take a look into that
Thanks for this low budged hf antenna, .i live near the Nort sea
in north west Holland 80 km north off Amsterdam
The antenna works verry well, 73s PA3DTQ
Thanks Walt!
Thanks for watching! Hope to catch you guys on the bands soon!
Another interesting antenna.....great contacts 😀😀😀😀
Thanks Kenneth!
Great design and video Walt. I am planning to build one soon. My plan is to pick up a 9:1 & 1:1 at Hamvention.
73
Thanks Reed! Have fun experimenting and let me know how it goes!
Thanks for another great antenna video Walt. I am currently struggling with my HF setup. I have a TennTennas EFHW that worked great at the beginning of the year, but has slowly gone deaf over the summer. I would like to put up a simple Harvest Taurus vertical in the front yard before winter (about 4 weeks away) but my wife really doesn't want the vertical right out in the front yard. A compromise that we came up with is a flag pole. I am looking at fiberglass flagpoles and I think this might be the perfect antenna to hang on the side of the antenna. This would be a "permanent" setup, so I need to figure out how to install and protect the unun and choke from the weather. Again, I think this may be exactly what I am looking for. Thanks again!
Thanks! I have the Harvest Taurus at my home QTH and to be honest it’s pretty stealthy and not bad looking
@@COASTALWAVESWIRES I watched your video on yours and that is what made me think about getting one. A buddy of mine has that exact antenna and he let me borrow it for a few days. With nothing more than a metal fence post, a 10 foot mast, a bungee cord and that Harvest Taurus, I was making DX contacts all of Europe. It is definitely big value at a good price. I may end up with that versus the flag pole and wire antenna. We'll see. I appreciate your content. As you can see you are helping out other Hams with the content you provide. 73
Wow fantastic work Walt hands down better than I've ever done.
Great job
73 friend 👏🏽
Thanks so much my friend!
Super great job. Thanks for sharing. Is there any other tips to DIY? Does it require antenna tuner
Thanks, yes it requires an antenna tuner.
That is some fantastic green screen work ;-)
Hahaha just another day on the coast!
awesome... huge distances !!!
Thank you!
So seeing this at the end of November for the 2 time and was wondering if you been working on this! I find the size is great. Scott KF0HRF
Thanks Walt for another good video! Why not use a 3 ft section of coax jumper between the 9:1 and Choke and use the jumper as your counterpoise, to make setup easier? Also a longer jumper between them could be used, laying across the ground to your rig, letting it decouple a bit to ground. Just a thought.
73 mike
good idea. 73, Walt
My antenna is similar to yours. The length is 6.2m, with 4 LC traps, usable from 1.8-50MHz. 😀
On your antenna is the short wire connected to the shield of the coax? I'd like to give that design a try after I get a mast.
I was working my G90 here in Michigan at 20 watts and a 9:1 random wire during the same time period and made several of the same contacts. I also got to California (1911 miles -weakly) and Herzegovina (4691miles) my longest QSO ever! Pretty good for no radials and no salt water. Like you Walt I wasn't expecting much. Every one on 20 meters was complaining about conditions but I found 10 and 15 to be excellent.
Hi Jeff, yes the short wire is basically connected to the shield side of the coax which as you know is the (-) negative post on the 9:1 unun. I hear a lot of guys in Michigan talking to Australia on Saturday mornings around 8 am EDT. Checkout 20 meters around 14.240 this Saturday around that time, you might have a new longest QSO. That setup should make the trip. All the best and 73!
Nice work, I’ll be cutting wire and trying that soon. BTW..I was wrong about which Rush song that your son’s band intro reminded me of. It’s actually called “Afterimage”. 73
Right on! BTW I’m a big Rush fan, saw them live a few times. My son actually has a Geddy Lee bass. He knows the deal haha
How fun! Thx 73
Thx 73!
👍Thanks for sharing. Could it be described as a vertical OCF-doublet?? The overall length of 20.5ft or 6 25m would make it a halfwave dipole on 12.5m. Does this explain the lower VSWR on 15/12m? It certainly works and seems like a good small footprint multiband antenna idea. Mission accomplished 😊.
Hmmm that might explain the VSWR on 15/12 for sure. Thanks for watching!
Nice job on that antenna.
73
W5KAL
Thank you Ken!
A 9:1 and the g90 is a crazy team.
Hi Walt, looks like another great day near the water for sure. I saw a previous iteration of this setup where your drawing showed the bottom 1 meter element beginning 3 feet above the ground. This version appeared to be down near the ground. Propagation conditions aside which version worked better for you? Being adjacent to the water being a factor I am sure. Thanks for another neat video and effort. 73
N4LWT
That’s a great question, as you can see in the video my original intention was to get it up a meter off the ground. It worked well lower but I’m thinking higher is better. Need to do some more experimenting and I’m also going to model it and see what the data says. Thanks for the kind words! All the best and 73, Walt
This might be what the shakespeare 390 is.... I find it strange that the feed is about 18in up on the antenna. Maybe its just to create some distance from the base that might be connected to a stainless rail or something. No idea. Hope to hear advice on my marine setup though. Need to figure out how to tie my ocean counter poise into my setup. Do I use a 1:1 balun? So many noise sources to deal with... solar, refrigerators, chart plotters vhf etc etc... all tied to same 12v system. Im in Annapolis and Virginia for the next couple months. Let me know if you want to get a beer. Cheers
I would say just get a wire connected to a through-hull metal fitting near the waterline and up to braided ground side of the coax and you have a perfect setup. Just needs to be at the waterline.
Walt, I found this article describing a similar antenna, using 9.3 meters, and 1.8 meters as the element lengths. Ross K8RLB
Interesting
Those SWR sweeps looked nice and flat. Seems like even using a rig without a built-in tuner, a simple manual tuner could be adjusted once on a band and left alone. You could probably even just write down the settings and use them again the next time you go out.
Yes I’m sure that would work
And how do you match the elements. Only through the Antenna Tuner?
Another great video. I can not tell what LDG product your using. Would that be the 9.1 UNUN? 73 KI4QFL
what is the distance between the top element and bottom element (spacing)?
can we use aluminium pipes instead of fishing pole and wire?
Hey Walt! I think if we exclude a 1:1 balun with a short feeder, then there will be less losses. Try! 😀
Will give it a try
I have a Cobweb 6-20m, and Antron 99 35 ft up and a G5rv at 45 ft. My best antenna on 10m is my homemade speaker wire dipole lol
Wow what a great performing antenna. Question: why are you using the 1:1 balun on top of the 9:1 unun? Still tying to understand baluns and ununs.
The 9:1 unun is for the impedance match at the feed point of the antenna and the 1:1 balun is a choke to keep all the energy in the antenna and keep common mode current out of the feed line (basically prevents the coax from becoming part of the antenna).
@@COASTALWAVESWIRES well explained!
A good video and antenna design. How many hours does your battery power your G90?
Thanks! Generally I can get 4 to 5 solid hours of use from it.
Hi, I made the antenna this afternoon and it worked very well……especially on bands above 20m. Can you let me know how you derived the wire lengths as I’m somewhat curious? I helically wound the top section on a 6m pole. Love your work. de VK3AWA
Hi Daryl, I came up with those lengths as they are also not resonate at any multiples of frequencies I used if that makes sense. I showed a graph of random wire lengths in the first video I did on this antenna if that helps. All the best mate!
@@COASTALWAVESWIRES Hi Walt Thanks. I will check out the first video. 👍
Love you shows thanks W8RRM
I wonder how a variation of this would work, using one metre of the coax between the unun and the CMC filter with the outer braid instead of the lower section? Looks like I'll have to make one to find out! VK4BOB
Will be interesting to see. Let me know!
I found a much more substantial surf rod holder at Bass Pro Shops - larger spacing between the bolt holes, next larger size aluminum angle. It is big enough for my Carbon 6.
Awesome, I need to stop in there myself
As said on last 17-5 I am still learning. To which terminal is the 3 foot extra wire attached and which the counterpoise please. The images were a bit quick for me to be sure. I think that I know, but checking. Thank you Walt.
Phil Suffolk U.K. 🇬🇧
@@FIL357 the 3 foot extra wire is the counterpoise and is attached to the ground (-) black side terminal of the unun. The longer upper (driven element) attaches to the positive (+) side of the unun. 73, Walt
@@COASTALWAVESWIRES Thank you Walt, as I thought. It’s very kind of you to reply so rapidly. I’ve made a few wire antennas. - Some have been ok, some not so good!😫
Hope to have a QSO at some point of time hence. Best regards, phil. g0nik
Very cool and very interesting. Neat to see what 20W can do with a minimal configuration with the right conditions. 73 VY2MJ 😀
Thanks for watching! 73 de K4OGO
Cannot wait until UK allows 20w on hf radio as per recent recommendations. Cannot progress further on my licence due to effects of strokes so 20w will be more than welcome. Building this at the weekend in advance of 20w permission.
Nice one Walt, just thinking and probably getting it wrong 😁 isn't a Carolina windom a off centre dipole I think this antenna uses a 4:1 balun have you any thoughts on this, and trying a 4:1 balun instead of your 1:1 balun. it's also international Marconi day Saturday 22 April are you going to play radio this weekend, thanks for the video Walt, Adam G7CRQ
Hi Adam, yes the Carolina Windom which is basically an off center fed dipole uses a 4:1, I actually experimented and tried a 4:1 with this at first and found the 9:1 worked better for this shorter antenna. I’m sure I will be on Saturday, it’s forecasted to rain here so I’ll probably just fire up the radio at home and play radio all day. 73 my friend!
@@COASTALWAVESWIRES cheers Walt, it's supposed to tip down with rain 🌧️ here aswell gives me a chance to try out my new umbrella 🏖️ 😁
could you help me with wire lengths to use on 17 Meters 18Mhz great video btw thank you 73's
For a 1/4 vertical 12’-10” (3.92 meters) will do the trick and be a perfect impedance match at the feedpoint
Beautifu
Wow great job 73 from kb2uew
Thanks, 73 de K4OGO