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So, i am just now seeing this video, as i was strolling though ham related videos, and i have to give a big thanks for taking the time to break this project down as you have, with a complete BOM. This is an antenna that i have been wanting to build, but have been having money as a restraint. You found a way to build this for ANY ham can do! Cant thank you enough! i have just subscribed and liked, and will continue to watch your videos! 73 from detroit, in the states!

Moopox

Everyone seems to just use the 100pf capacitor, but has anyone tried putting a mica compression trimmer on there instead and seeing if the optimal capacitance value changes as things like stacking cores is adopted?

First, thank you for your videos and for publishing your build. In the States, I can't get a 20mm aluminum pipe. I can go down to 3/4, and the 20mm flange should fit, or do you think I should go 1" pipe. For the 1 " I will have to source a new flang. I believe in one of your videos you said you were thinking about going up in size on the center mast. Any help would be appreciated.

Question. On the 1002 core, what size magnet wire do you usually use? 73

Why did you wind it so tight /close together ? Will it affect it much if you spread these out?

If anyone knows of a US supplier for the clamp halves, please post in the comments. Not sure if we can get those here or if I have to order from the UK.

I would have used a DPDP switch to completely bypass the UNUN.

Hi Colin. I know I'm a little late to the party but I just found this video. My question is in regards to the overall number of turns on the Ferrite vs efficiency and swr. Would 21 and 3 be better than 14 and 2? Thanks Kelly

Just clicked on the Mouser link to buy one of these, £5.94 I thought that was a good price until I saw the £12 delivery gulp, then I found the other delivery options and clicked on the DHL bill recipient but no price next to it, not sure what this means do they charge me on delivery but at what price

Any video to calculate the log? I did the math but cant find how to change it to db.

Бред конечно,но в качестве эксперимента - интересно

It's so great of you to share your knowledge with us. You've have thought deeply about all aspects of your build. Your video will save us hams who are interested in building their own hex countless hours of non-productive exploration and frustration. Well done!

I got into the hobby like 2 years ago when i got an RTL SDR and listened on HF to volmet and airband, and then ham bands, i got fascinatted by CW, i'm from Algeria, i could hear SSB from spain and italy and sometimes france and germany, but on CW i could decode with fldigi people from eastern europe and some beacons from greece, turkey and even as far as a beacon from finland and russia. i started learning morse this week using an app on my phone (MorseMania is really fun), and also listening to audio or morse characters while driving or trying to sleep. I intend to pass my license this year, yeah sure CW isn't required anymore but i'm planning to get into QRP, i'm not really too much into SSB plus SSB hardware is expensive and hard to get in my country. A local ham from some city a bit far from mine (no club in my city), was whinning about how the hobby is dying bc of the digital modes, i don't think so, specially with stuff like LoRa, i got interested in antenna bc of LoRa, i wasn't really interested in the classical voice HF mobile rigs, i'm more into experimenting with antennas and electronics, so QRP is my ham, no pun intended xD yeah, sure CW can't rival FT8 mb, but CW QRSS is on par with it, or mb even exceed it.

Great work Colin.. if your up to more...have a look at the 2661102002, 61 material cable core, I've only got 1, these are not easy to get in Mexico, so can't do a back to back, but another poster did get some and found they offered better than 95% efficiency. My experience has been positive, with the 14:2 auto-transformer close winding offering 1:1 VSWR... hope to get another to do some tests. When you get high efficiency along with the high curie temperature characteristics (if heating even occurs) I could see using 300 watts SSB or even more being a possibility. This using a 14mhz vertical EFHW (using a 12M Spiderbeam pole on your recommendation) gets me some startling results... even with just 100 watts.

Question: Your soldered tap appears to be on the 3rd turn. Did you do that on purpose? Most taps I've seen are on the 2nd turn that passes thorogh the center. Just womdering thanks for all your work.

It is likely that the SWR changed not because the transformer was heating up, but because the transformer was heating up the capacitor and its capacitance was changing. But video is interesting, 73 ;)

Hi Colin, I'm using this toroid .. 1002 (49:1 Autotransformer) and it works well. No heating issues during long FT8 sessions at 80 or 90 watts. 73 de 2E0RPS

so as a budding transformer builder, how do you modify your transformer designs to handle higher wattages? For example, if you wanted to build a 49:1 that would handle 500w digital, how do you go about picking the core(s) to use in this situation?

Thanks for the video What material and thickness do you recommend for the radiant wire (20 meters)?

I'll be using a pole as my 'permanent' solution in my back yard, was thinking of just embedding a section of PVC 2' in the ground in concrete, flush with the ground. That way I lose 2' of height but gain some stability. Then I'll guy as you suggest, which is brilliant - thanks!

Great work! I did start with a FT140-43 because it is the standard, smaller and lighter (I'm QRV portable only). For 100 W SSB perfectly ok and 10-15 % less efficiency doesn't hurt but considering digital modes this Fair-Rite looks like a great upgrade to have less loss and less heat in a bigger core enabling 100 W digital and lower bands in one go. Why not build a 160 m EFHW 😅

Thank you for taking the time to share all of this information with us. Its inspiring me to build one for this coming summer field day. I need to get cracking.

Tim Ortiz N9SAB uses a unique core in his antennas of this type. The performance and VSWR curves are amazing.

Very impressive.

that’s a nice little blue shack Colin!

Thanks Bro! I tried looking into 5/8th wave antennas for lower bands than 2 and I had a very hard time finding any info at all! I gave up for a couple years. tried again.. nothing.. waited a few more years.. and NOW.. there is some good info! Thanks again! :) KD0YKK

15ah lfp4 + mppt + 100w solar panel + anytone radio trans..

Hi Colin. Did you ever test spreading those wires out? In my experience, having everything bunched up causes a hotspot on the core, making it easier to get to the Curie point, just based on the fact that the magnetic flux concentration is high around the group of wires and the reluctance will cause core losses (as well as heat from DC resistance) all being concentrated. I observed this with a thermal camera on previous designs. I would expect spreading those out will even out the flux distribution and help with cooling.

Thanks for your work, Much appreciated

Cheers

What manufacturer and model of the capacitor are you using in this experiment?

I find this system simply brilliant !!! 73 de IV3YNB

Hey Colin Great information. Bit confused, 14 turns and tapping on the second makes it a 12:2 and not 14:2 or am i missing something ?

As good as it gets!!! Did you tried QRO with this Hexbeam? DX10 wire should handle it... maybe the two aluminium strips would be better kept a bit more spaced each other, for QRO. What do you think? Also: why didn't you use the liquid tape on those strips? vy 73

Well done, nice work. May I ask where can I find those wire reels for sale? Or... did you printed 3D on your own? 73

I've been watching to see if the Life's a Breeze poles in stock for the last year. Nope. Going to buy a Spiderbeam! Thanks for your videos, Colin!

A 5/8 is crap for some DX angles, fantastic low angle (9°-12°) but from ~20° - 45° they dip 7-9dB. I've been a .625 advocate for decades but often get out-talked in 10M DX land by lesser powered stations sporting simple cheap (junk) 16' 7/16 wave A99s because they love higher angle and ~20° they kill a 5/8. You'd be much better off going out to .66 for gain at the higher DX angle, plus it's a bit lower feed point impedance so easier to match, like a simple 75Ω 1/4 wave coaxial matching transformer for ~1.25:1 Plus you'll increase the capture area But the 5/8 T2LT design - (like the Sirio GainMaster) is really king of the hill.

Have never really tested this antenna for years. Given that I was never allowed to use more than 25 watts on HF, but for a few years now it has been 100 watts and have now been working on FT8 for a few days and actually only check the ALC and the Power out, max. 100 Watts have been used for a while but never really looked at the SWR. After this vid I will follow this for a while. If I can clearly deduce something, I will post the results here.

2m radials for 20m band?

Would u sell the 11 meter moxon

Would u sell the 11 meter moxon

DO NOT BUY FROM dx commander!!!! THEY HAD A RAINBOW PEDOPHILE FLAG IN THEIR SHOP, I SAW IT IN A VIDEO THEY PUT OUT.

Nice to see you on the air colin. 40,20 and 17m cw and ssb been fantastic recently into uk LP , 9am your local time. Hny .

1.18 mm wire is equivalent to 17 AWG.

Time t0 make a follow up video 2 yrs down the track Colin 🙂

Awesome setup! Greetings from MM7HHV