I have a question- I am using 49:1 with 64 feet long wire endfed antenna (Par EndFedz® Antennas EF-40-10-KW) and it gives me 10-40Mtr bands with very low SWR with some times use of build in tuner of my radio ICOM 7300. I have a question, that can i connect my AH-4 Antenna Tuner to 49:1 endfed for more enhanced tuning for all the bands? or it may damage my endfed as that is not designed for other than 10-40Mtr. Please advise. Also I have a question for your antenna and counter poise wire details - like make, manf., specifications etc. as I have not yet installed my ground, ligthing arreseter and counterpise.73, VA3SIP
Thanks for your question: The AH-4 is an icom external ATU designed for (random) long wire antennas longer than 23 feet. You wrote you have an end fed 64 feet with 49:1 unun - this is an EFHW wire antenna (not a random or long wire antenna) The AH-4 was made to work with random long wire antenna with an impedance of around 450 ohms. Your 64 feet antenna is an EFHW with an impedance of around 2450 ohms this is why it came with a 49:1 and not a 9:1. If I were you, I will not use the AH-4 for this EFHW antenna. If you want to use this EFHW antenna then connect this 49:1 to your Icom 7300 antenna port directly BUT better thru a 1:1 balun so the common mode current will be stopped by the 1:1 balun. This 1:1 should be installed near the IC7300 antenna input. As for the second question about counterpoise etc.. All my antennas are DIY - I like building antennas not buying them. I like to make my own balun and unun this way, I can be assured of the materials and performance before I use them. I bought my lightning arrester, connectors, coax cables, toroid cores, boxes and speaker wires all from Amazon. I have a video on how to build a 1:1 balun. My antenna is a random wire 71 feet in length using 22 GA speaker wire. Using speaker wire is economical because you get a pair every time. So a 100 feet speaker wire is actually a 200 feet wire antenna. My counterpoise is 71 feet stapled along the baseboard of my backyard fence, elevated 4 inches from the ground. My wire antenna is the other 71 feet (after splitting the speaker wire) this is raised vertically 16 feet off the ground then ran like an inverted L. I made a 9:1 balun (not unun) therefore, I need an equal length of wire for my counterpoise. It is like a dipole. If however, I used a 9:1 UNUN - then I only need a counterpoise length of around 35 feet. Good luck, 73 - please watch my other videos in my channel - you might get an answer there too. Remember, I make my own antennas.
Is that a balun or unun? If is random wire should be a unun 9:1, so your coax is your counterpoise , and the choke should be after 30 feet of the coax. No 1.1 at feedpoint. And no ground cable or rod at the coax, that kills your swr on random wire. Mine is only 49 feet in sloper and i have less than 1.5 in all bands except 17m and 10m that are around 1.8 . On 20m and 40m is 1.1 and don't use the tuner of my 710.
I made a 9:1 balun this is the reason I installed a 71 feet counterpoise near the ground. Here is my updated results ua-cam.com/video/szvoNYhziDQ/v-deo.html - I can operate on all bands except 180 meters
40 Meter is useable. The FT-710 internal ATU and the ATU-100 with my FT-891 both tunes this band with ease. I will post a video with my 40 Meter contact.
![Build Your Own End-Fed Half-Wave Antenna [A Complete Guide to EFHW]](http://i.ytimg.com/vi/SBrc1DpMk_w/mqdefault.jpg)
Mabuti pare. Salaamat ✌️🇺🇸🙏
Well done
Thank you
I have a question- I am using 49:1 with 64 feet long wire endfed antenna (Par EndFedz® Antennas EF-40-10-KW) and it gives me 10-40Mtr bands with very low SWR with some times use of build in tuner of my radio ICOM 7300. I have a question, that can i connect my AH-4 Antenna Tuner to 49:1 endfed for more enhanced tuning for all the bands? or it may damage my endfed as that is not designed for other than 10-40Mtr. Please advise. Also I have a question for your antenna and counter poise wire details - like make, manf., specifications etc. as I have not yet installed my ground, ligthing arreseter and counterpise.73, VA3SIP
Thanks for your question: The AH-4 is an icom external ATU designed for (random) long wire antennas longer than 23 feet. You wrote you have an end fed 64 feet with 49:1 unun - this is an EFHW wire antenna (not a random or long wire antenna) The AH-4 was made to work with random long wire antenna with an impedance of around 450 ohms. Your 64 feet antenna is an EFHW with an impedance of around 2450 ohms this is why it came with a 49:1 and not a 9:1. If I were you, I will not use the AH-4 for this EFHW antenna. If you want to use this EFHW antenna then connect this 49:1 to your Icom 7300 antenna port directly BUT better thru a 1:1 balun so the common mode current will be stopped by the 1:1 balun. This 1:1 should be installed near the IC7300 antenna input. As for the second question about counterpoise etc.. All my antennas are DIY - I like building antennas not buying them. I like to make my own balun and unun this way, I can be assured of the materials and performance before I use them. I bought my lightning arrester, connectors, coax cables, toroid cores, boxes and speaker wires all from Amazon. I have a video on how to build a 1:1 balun. My antenna is a random wire 71 feet in length using 22 GA speaker wire. Using speaker wire is economical because you get a pair every time. So a 100 feet speaker wire is actually a 200 feet wire antenna. My counterpoise is 71 feet stapled along the baseboard of my backyard fence, elevated 4 inches from the ground. My wire antenna is the other 71 feet (after splitting the speaker wire) this is raised vertically 16 feet off the ground then ran like an inverted L. I made a 9:1 balun (not unun) therefore, I need an equal length of wire for my counterpoise. It is like a dipole. If however, I used a 9:1 UNUN - then I only need a counterpoise length of around 35 feet. Good luck, 73 - please watch my other videos in my channel - you might get an answer there too. Remember, I make my own antennas.
My one cent advise will be to use 84feet wire rather with much better swr results. Even 40m will resonate better
13 feet of additional wire, very easy to do that. I will try it. Thanks.
Is that a balun or unun? If is random wire should be a unun 9:1, so your coax is your counterpoise , and the choke should be after 30 feet of the coax. No 1.1 at feedpoint. And no ground cable or rod at the coax, that kills your swr on random wire. Mine is only 49 feet in sloper and i have less than 1.5 in all bands except 17m and 10m that are around 1.8 . On 20m and 40m is 1.1 and don't use the tuner of my 710.
I made a 9:1 balun this is the reason I installed a 71 feet counterpoise near the ground. Here is my updated results ua-cam.com/video/szvoNYhziDQ/v-deo.html - I can operate on all bands except 180 meters
ua-cam.com/video/szvoNYhziDQ/v-deo.html
does the neighbor have any concerns about RF exposure?
If they have, they haven't talked to me about it. I know my neighbors very well. I am waiting if or when they start talking about the wire antenna.
I guess 40 Meters is non usable
It is when he loads the coax up
40 Meter is useable. The FT-710 internal ATU and the ATU-100 with my FT-891 both tunes this band with ease. I will post a video with my 40 Meter contact.
here is the video of my 40 meter contact ua-cam.com/video/wi1bOSGsOV0/v-deo.html