End Fed Antenna 150W End Fed Half Wave Antenna for Ham Radio, 1-30MHz CW FM AM FT4 FT8 SSB End Fed Half Wave Radio Antenna 4 Band 8 Band for Outdoor 1:64 1:49

This is a very nice little transformer (BH7JYR Jaycar cored design) for EFHW antennas. I finally got around to testing and using it, and I must say that I am impressed for a $30 device. I ended up using it on a 40-10m EFFW, and it works pretty well. I am attaching bunch of graphs (in the field and the LAB tests) to show its performance.Although it is a 64:1 unun, it really behaves more like a 49:1 device. In testing it had the best performance at ~2250 ohm load, although it is not very different at the advertised 3200 ohms (efficiency drops about 3-4% across the bands) All in all, this unun will lose you about 0.2 S-units, which is insignificant. I initially tuned the antenna with ends at 30 and 35 feet high, but when the second end was raised to 60ft, the tuning was unaffected. My antenna has a 1.26uH compensation coil located 2m from the transformer (13 turns of 16AWG wire on 0.625” PVC former). Antenna wire is stranded 16AWG. The counterpoise is 2m long, in line with the antenna, and is connected to a hose clamp mounted to the PL259 shell. I also tried 3m and 4m with insignificant difference. The CM choke is located at the feed point (9 turns of coax on FT240-31), but I also have one close to the rig to prevent RF from feeding into the computer stuff (12 turns of coax on FT240-43). You may not need this, but my station is only 20ft away from the counterpoise, so 20m band was getting thru.A pleasant surprise was that the antenna ended being resonant on 80m. Not the best SWR at 2:1 or better across the band, but workable. It is not the coax length (I tried different lengths with no difference), but the interaction of the xformer and the antenna structure. However the input impedance is way off there, so the efficiency will suck. I would mostly say the same for 10m band, but the rest seems to work very well. Using my transceiver ATU I can easily load up 60, 30, 17, 12m bands too, but I expect with terrible efficiency. You really need an 80m wire version to do this well.You can easily run 150W CW into this on 40-15m bands, and the Jaycar core doesn’t really get very warm at all. If running FT8, I would not do more than 80W.Although the housing has integral rubber grommet, my suggestion is to open it up, and apply a bead of RTV along the edges, and then button it up. It will never leak. The housing is ABS plastic, which does not have the best UV resistance. Changing it to ASA would make it impervious to UV, at few cents difference at the molder (suggestion to the manufacturer).In summary, it works great, easy to deploy, and nothing bad to say about it. Frankly, if I were making my own, it would actually cost me more.See the attached graphs, and good luck.

It works just as well if not better, than my MFJ EFHW antenna that got broken in a storm (BALUN was damaged) I took the wire off the MFJ BALUN and put it on the GOOZEEZOO BALUN and strung it back up the same way, and it performs great!

It works as expected. Please keep in mind the length of the wire for the endfed. I put a 67-foot-long wire, and it gives me the following SWR reading:10m - 1.712m - 1.115m - 1.317m - 2.120m - 1.730m - 2.540m - 1.6

seems to work, but has a "design flaw". If you look at similar ones, they have a bolt with a loop on the left and right side for the wire to connect. I did not realize until I was trouble shooting my first 80 meter dipole that was missing. The two wing nuts on the side, do not have loops to attach the wire to take the stress of the tension on the wire. With an 80 meter dipole, you will be putting a lot of stress to tension so much wire. Instead, I connected them to the top loop, and then attached the end to the wingnut connectors. Well, that leaves your two wires of the dipoles touching at the top. Now, I used some zip ties to isolate them, but could have been better.

I'm really happy with this unun, it was easy to hang and string up. It ships in a heavy, strong and well molded case that looks to have good weatherproofing. I had no problems putting 80 watts through it, and made a number of SSB and FT8 QSOs within a few hours of getting it tuned up. I wired it up for 20 meters with a 66 foot run. I used the Bntech 20 gauge silicone wire - it's stealth and practically invisible.Don't forget to put an FT240-43 toroid on your feed cable with 7 winds, and also add a counterpoise wire. I use a hose clamp to attach my counterpoise wire.The only thing that could make this better is if it shipped with a glossy well written English manual with a few scenarios, or some sunscreen and some dacron rope. I'll definitely buy another one to take with me for work trips and vacations. Thanks Goozeezoo for a high quality product.

Good value for the money if your a ham with a limited budget. This 1:1 balun performs well! Amazon helps me stretch my dollars further with their offerings. Most everything is very good quality and for that I’m thankful! Keep the good quality stuff coming!

Using for a 40M EFHV. It works great. I've got an SWR below 1.75 on 40/20/10.It was super easy to build and to deploy.

Works as it should. Seems solid.