Variable EFHW Antenna - X-Tenna's 3-in-1 EFHW - Setup, Test & Review
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- Опубликовано: 8 сен 2024
- In today's video I am reviewing the X-Tenna's Variable End Fed Half Wave Antenna. This is a unique antenna in that it allows you to change the Unun configuration with the flip of a switch. Check it out and thanks for watching. 73
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My Current Shack Setup:
ICOM IC-7300
Yaesu FT-2980
DX Commander Classic
Comet GP-9
Diamond GZV4000 Power Supply
LDG AT200 PROII Tuner
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For the counterpoise I think it comes down to use. For anyone using one in a fixed installation, if they have a resonable amount of coax running to the antenna, then the coax acts as the counterpoise. Grounding etc are a bit of a given. Anyway when in the field you might want the counterpoise since you may have small amount of coax. It is definitely a try it and see situation. Every situation is different.
The formula for determining the necessary counterpoise length is:
Longest wavelength in meters X 0.05 = length of counterpoise
In my case: 40m X .05 = 2m
A 2 meter length counterpoise significantly helps both TX/RX.
I agree, you should make accommodations based on your situation, but normally I just trust in my coax which is 50ft most of the time to act as a kind of counterpoise when operating. Thanks for the comment and for watching. 73!!!!
I bought this antenna and finally got around to getting it tuned up. I started out by winding a 11 turn inductor on a 3/4" pvc pipe and placing that 6' from the feed point. I cut and tuned it for 30 meters first (47sh feet start long) this length will work for 30 and 17. I then put a link in and added the rest of the wire and tuned that for 40 (67sh feet) 20 15 12 and 10. The inductance added 6' from the feed point will allow CW operation on the higher bands, so with 1 link you can cover 40 to 10. 73 N7BYD
Nice work! That is awesome!!! Thanks for watching and for the comment. 73!
Great video, as always. Going to have to finish some of the other antenna projects I've started before I pick this one up, otherwise I'm just gonna add to the pile. lol.
LOL...this is the way... Thanks for the comment and for watching. 73!!!!
Great video thx
Glad you enjoyed it!! Thanks for the comment and for watching. 73!
The switch is a great idea!
I think Colin made the video on the 56:1 as he did a matrix on all the turns ratios and cores. :)
www.youtube.com/@MM0OPXFieldRadio
Awesome! I will check it out. Appreciate the share! Thanks for the comment an for watching. 73!!
How many amps is the battery you are using with the rig? Great video.
I am using that Bioenno 20aH battery. It says on the side that it is 20A max continuous and 40A Max Peak. I hope this helps. Thanks for watching and for the comment. 73!
Just curious, did you do a measurement on 64:1 or was the swr too high?
I "think" I did a measurement on 64:1. If it had been off, I probably would have talked about it in the video, so I think it was ok. Hope this helps. Thanks for the comment and for watching. 73!
Perez Angela Thompson Maria Rodriguez Barbara
Scott, I heard a lot of reverb. Was there long path/ short path propagation going on?
Notice how the echo went away when he walked out of the pavilion.
The bands were acting weird today. I would hear a station one minute then lose them the next. It was a lot more prevalent on 10M. I also had an unusual amount of noise at that location which is usually more quiet. Thanks for the comment and for watching. 73!!!!
I bought this antenna several months ago to take on a trip to New Hampshire. I only had one chance to set it up due to weather. I hung from my 20cft Sotabeam as a sloper. Could only unwind wire about 40ft before running out of room in wooded backyard where i was staying. I heard a lot of calls but nobody heard me. Switch was set to 49:1. Was using my IC-705 at 10 watts. The rest of the wire was spooled up around the bat wings of the X-Tenna. Was not an ideal situation at all. Do I really have to cut the wire down to tune it or would leaving the excess spooled up on bat wings work? Upset that I didn't get more time to use it. Thanks!
Brian(KE8OVP)
I always prefer to tune my antennas to a resonant state so that 1. I don't have to use a tuner and 2. It will be done once and for al and resonant on 4 bands. Although your situation wasn't ideal, it seems to work a bit, but I bet you would get better performance out of it if you tuned it. I hope this helps. Thanks for the comment and for watching. 73!
Thank you for your time and help. This will be my first time tuning an EFHW. Afraid of cutting to much wire or screwing it up.
Here is a possible solution: Do NOT cut the wire. Merely fold it back on itself to the desired length. In my case, I had to take 2.75' off the length, so I just folded it back that amount. Got an acceptable SWR and it's been deployed that way ever since.
@LeopardAppaloosa755 Wow! This was exactly my line of thinking. I think i used the wrong choice of words (wind instead of fold). The reason I say this is that there is another
EWFH on Etsy that comes on a self-winding reel (orange case). You pull out the correct length of wire to become resident, and the rest stay spooled up on the reel. Thoughts?
@@briangarrison9518
Not sure what it will do because -
1. If the extra is wound up on the transmitter end it will act as a coil.
2. If the extra is wound up on the antenna's end... not sure what a big ball will do. Just gotta try it. Being folded back on itself once only acts like a shorter length. Let us know if you try it!
Moore Shirley Rodriguez Eric Anderson Larry
Thanks for the comment and for watching. 73!
Anderson Edward Johnson Frank Davis Edward
Solder not soder
Thanks for the comment and for watching. 73!