I used to get microphone “tingle” with my efhw antenna on transmit. I took your advice and choked off the coax feeder before it enters the rig. Did the trick. Problem solved. Thanks!
A few days ago I put one up that's 71' long. I also put a good RF ground under it.... lots of radials with one hooked to my neighbor's chicken wire fence and another to a cold water spigot to my house. I've made a lot of CW contacts with it over the weekend. 17 meters opened up and I worked a station in Denmark and another in England. Domestic QSO's included HI and AK. I'm surprised how well a "random" wire antenna works.
I have a theory that as soon as you introduce an antenna tuner, you are resonating the antenna, as well as matching z. Therefore the antenna ends up becoming 'electrically' the correct length anyway. There is no RANDOM. The reason for avoiding even 1/4 wavelength multiples is the very difficult z match which extends above 2k. But a very good video and great hands on instruction. Yep solder your crimps 😊. Paul.
I like the way you explain the antenna in layman‘s terms. Very easy to follow which led me to subscribing to your channel. I wanted to clarify the distance between your Unun and choke. 25 feet, right? That would give you a 25 foot counterpoise.
RF choke is taking your free possible energy and making you pay the power company for power. Wow great video to learn what not to do. Unless you like paying extra money for electricity. Then follow this guy.
These types of chokes work very Well and add protection for you and your equipment. If you have ever received RF burns from your equipment this is you best solution.....Those of you who have used end feed antenna and experienced this know what I am talking about.
Good idea and I love learning from this video but the trembling of your hands made it awful. Please made your next video to be stable without shaking hands so that it can be viewed comfortably. Thank you. I am following you.
I have a myantennas 160 thru 10m longwire unun with 135 feet of wire in a lazy inverted v. I use 80 feet of times microwave lmr 400 coax to a ldg remote tuner outside 80 feet from the shack then a 3 foot piece of coax from the remote tuner to the unun of the antenna. Where is the best place for my choke....on the 3 foot section between the tuner and the unun or at the remote tuners feed point or in the shack at the radio? I currently use a choke between the tuner and the unun but I also put a palomar ferrite donut with 9 turns at the feed point of the tuner. The tuner and unun are grounded with 2, 8 foot copper grounds and im only 7 feet above sea level here on the east coast. Am I canceling out my counterpoise created by my coax run? I have no rf but the counterpoise part you mentioned with my coax I think I need to help out. Seeing this video leaves me in doubt I have it set up correctly. My inverted v peaks up about 40 feet above ground btw. Thanks
Hi from Turkey..I am just a sw listener..I made a 53 feet long wire..Should I need an 9.1 unun even for only recieving,listenin shorrwsve radio..so If I dont use it, what kind of problems will I have? Please help me..good evening from izmir Turkey😊
For a single frequency, you can tune the antenna to be resonance at 915MHz. The length for a full wave vertically polarize antenna would be equal to 936 / frequency in MHz or 936 / 915 = 1.02 feet or 12.2 inches. I hope this helps...
Most of these setups seems to assume your receiver can accept a coax. Mine (vintage receiver) just has two holes, one for antenna and one for ground. What then?
I used to get microphone “tingle” with my efhw antenna on transmit. I took your advice and choked off the coax feeder before it enters the rig. Did the trick. Problem solved. Thanks!
I'm happy that you found this helpful!
A few days ago I put one up that's 71' long. I also put a good RF ground under it.... lots of radials with one hooked to my neighbor's chicken wire fence and another to a cold water spigot to my house. I've made a lot of CW contacts with it over the weekend. 17 meters opened up and I worked a station in Denmark and another in England. Domestic QSO's included HI and AK. I'm surprised how well a "random" wire antenna works.
I have a theory that as soon as you introduce an antenna tuner, you are resonating the antenna, as well as matching z. Therefore the antenna ends up becoming 'electrically' the correct length anyway. There is no RANDOM. The reason for avoiding even 1/4 wavelength multiples is the very difficult z match which extends above 2k.
But a very good video and great hands on instruction. Yep solder your crimps 😊.
Paul.
Can't wait for part two!
Thank your for the piece of information of this video. Please you next time a steady tripod for your camera in order to avoid shaking the picture.
I'm feeling sea-sick after watching this video.
Great information,, thank you. But, please buy yourself a camera tripod!
I like the way you explain the antenna in layman‘s terms. Very easy to follow which led me to subscribing to your channel. I wanted to clarify the distance between your Unun and choke. 25 feet, right? That would give you a 25 foot counterpoise.
Yes, you are correct.....
That is nuts!
RF choke is taking your free possible energy and making you pay the power company for power. Wow great video to learn what not to do. Unless you like paying extra money for electricity. Then follow this guy.
These types of chokes work very Well and add protection for you and your equipment. If you have ever received RF burns from your equipment this is you best solution.....Those of you who have used end feed antenna and experienced this know what I am talking about.
Good idea and I love learning from this video but the trembling of your hands made it awful. Please made your next video to be stable without shaking hands so that it can be viewed comfortably. Thank you. I am following you.
So if I am only using me long wire for receive, I won't need the 1:1 choke, right? Thanks, man.
Correct
I have a myantennas 160 thru 10m longwire unun with 135 feet of wire in a lazy inverted v. I use 80 feet of times microwave lmr 400 coax to a ldg remote tuner outside 80 feet from the shack then a 3 foot piece of coax from the remote tuner to the unun of the antenna. Where is the best place for my choke....on the 3 foot section between the tuner and the unun or at the remote tuners feed point or in the shack at the radio? I currently use a choke between the tuner and the unun but I also put a palomar ferrite donut with 9 turns at the feed point of the tuner. The tuner and unun are grounded with 2, 8 foot copper grounds and im only 7 feet above sea level here on the east coast. Am I canceling out my counterpoise created by my coax run? I have no rf but the counterpoise part you mentioned with my coax I think I need to help out. Seeing this video leaves me in doubt I have it set up correctly. My inverted v peaks up about 40 feet above ground btw. Thanks
Use a tripod if you have one. Too shaky video.
When you bend and wire tie the end of the long wire for tuning purposes, how is that end connected to the insulator?
Hi from Turkey..I am just a sw listener..I made a 53 feet long wire..Should I need an 9.1 unun even for only recieving,listenin shorrwsve radio..so If I dont use it, what kind of problems will I have? Please help me..good evening from izmir Turkey😊
Izmir and Izmit 😍👍
What about an antenna at 915 MHz using a single piece of wire, AWG#18, 1/4 wave? What impedance is expected and what is the best way to match/tune?
For a single frequency, you can tune the antenna to be resonance at 915MHz. The length for a full wave vertically polarize antenna would be equal to 936 / frequency in MHz or 936 / 915 = 1.02 feet or 12.2 inches. I hope this helps...
Most of these setups seems to assume your receiver can accept a coax. Mine (vintage receiver) just has two holes, one for antenna and one for ground. What then?
Shield of coax to ground
Center of coax to antenna
Ladder line
In which link do I get that information?
Please put your camera on a stand. It makes me dizzy watching.
get a damn tripod