Відео

Awesome setup! Greetings from MM7HHV

How did you determine which end of that 17pF coaxial wire capacitor to connect to the radials and which end to connect to the 5/8 wave cut wire? … or does that matter? VE3VVW

This video is inspirational to a new ham like me. I am inspired to make a 5/8 wave vertical 😊

20M band is the eternal god.

If you are running high power you need to keep in mind that this system offers zero second harmonic suppression. If your amp has a pi network, instead of pi-L network, you will likely be transmitting a readable signal on your second harmonic.

Very interesting. Can you please give me some details on where and how to get one of these active antenna kits. Thanks. Paul. De HS0ZLQ, G0MIH. 😊😊

No contest. Had a hexbeam destroyed by hurricane Milton, and a over 50 year old technology Hustler 6BTV that survived the high winds and like a Timex it kept its match and I was able to message out hurricanewatchnet with my post hurrican report. Although I am rather dissappointed with the vertical, (with no gain) it still stands for its ability for high power capability. Restricted space is this vertical's attraction, but without a full set of underground radials the best I could do was a certain height above ground and some counterpoises set for 80m. Research reveals 2db gain can be acheived only if you buy into the ground radial package (more $). I am in the process of planning to replace this antenna with a high power cobb-web configuration where at least I have some control of height hopefully mitigating damage that I previously experienced on an adjustable Rohn mast instead of a tower.

我经常关注EFHW变压器的制作，试验了49：1、56：1、64：1，直到前几天，我用18AWG的镀银特氟龙导线实验时发现一个问题：这些比例在大多数导线--指裸铜导线、带绝缘皮的导线、不锈钢导线上具有几乎相同的表现，但在实验电阻很小的镀很导线时，发现49：1比56：1更适合40米频段。也就是说EFHW变压器的比率和导线的电阻率相关。到现在为止，我还没得出更多的结论。感谢您的视频，我在您的视频里得到了很多有帮助的知识。73 DE BD3OLH。

Cordless drill. BOSCH. Lol

Mr. Colin, Merry Christmas . Cx3cc

Colin, what software are you guys using for streaming to UA-cam. I want to stream when I'm operating GB2WWA in January, and I've tried OBS Studio but it's not great, unless I'm using it wrong. Thanks. Adam G1ZHD

What’s the power handling of those relays

You have described the transformer, but not the wire length for the antenna and whether a coil must be used. Because a HyEndfed has a total length of 22.74m. The first 20.35m come after the transformer, then a 110µH coil and then the last 2.39m, where the SWR is adjusted by shortening or lengthening the 80m band. What is the length of your antenna wire and does it also have a coil? TThe Antenna goes from 80-10m.

Colin could i enquire where you got the black ratchet clamps you using to fix to the main pole were from please?

The PINECIL soldering iron is super compact and convenient for occasional PCB work. Power with 12v or USB C. Not the most powerful, but perfect for the little jobs and you've got the butane one when it's something big.

Great video woprks a charm!!!. Where do I buy that strap you have holding the balun to the pole?

Would you build one and sell it to me

Hi. I had a wellbrook ALA1530 loop for many years until it failed. The amplifier is potted and not really repairable. Wellbrook wanted £100 for a new one. I decided to make my own two transistor balanced amplifier with 2N3866 transistors from the GQRP club, mine actually predates the Wellgood copy of the Wellbrook, I've made a couple using 15mm copper pipe to give a 1 meter loop. This massively reduces my noise floor, I also made my own bias T and relay switching to switch between my TX antennas to the RX loop, which is good from Long wave to 6 meters

WOW! That really works well. Will definitely give it a go. Merry Christmas from North Wales Colin and family. 2W0IEP 73

I built a mag loop about 6 months ago, my off center fed dipole, runs a noise floor of about S 7-S10, I can't remember exactly what the noise floor was on the loop was, but it was much less than the OCFD, it tunes from 40 to 15 meters. This was a good video for those looking to try one thank you Colin. 73's🎙KD9OAM🎧

Nice example and demonstration of loop Colin!!! Simple, effective, cheap and affordable antenna to any ham with skillful hands!! As I start 40 years ago, (preferebly monoband loop) still amaze me during TX & RX. 👍73,S51X

it must have been really bad before because that was terrible;

Another New Subscriber here.Very neat and tidy work there.Think i will order one of these kits from Chris.Ive got a Cross Country LAA ++ and an MLA 30 at the moment so it will nice to do a bit of a shoot out between these 3.Thanks Barry

Colin, Thanks for another great video! I probably don’t need the loop because I am in a low noise area here in rural South Carolina. But thanks for the link to the George Smart page. Wow! What great collection of resources and fun stuff. I saved the link in my ham radio favorites. 73 and Happy Christmas de N9XY Michael.

Loop antennas the forgotten antenna but I'm glad to see they are making a comeback. Well done to you. 73. Paul Thailand HS0ZLQ, G0MIH. 😊

Great results shown there. I suppose that I am lucky that I don't have much around me in respect to anything that can produce noise, and of course hope it stays that way.

Super demonistration of the loop. Working really well. Those clamps for attaching to the mast are very nice. Another great video. Thank you

Is this the copy from the Wellbrook loop antenna ? Interesting that the site talks about fake clones from Russia and China ? Is this not a clone too or does “reverse engineering” not count ?

good video. is it only for 40 Meter band or does it cover all the HF Band ?

That website you likend to sucks! Terrible adds that pop up making navigating and reading the site a pain in the ass. Somehow it gets through my NextDNS filter.😡

Great video thank you. Can I make a couple of observations. When you cut the lugs off of the inside of a box or the lip on the bias tee box, use a sharp wood chisel instead of the knife. TBH I was cringing and expecting to see a spurt of the red stuff. Also the point geometry on those step drills is not very good and I find it far easier to start the hole using a standard drill. And finally I put a mark with a sharpie pen on the step above where I want to drill when I use a step drill. It saves a lot of guess work. Good luck and have fun.

Blimey. Maybe I need to get one! I have an MLA 30 on a shortwave receiver I have in my other QTH - hadn't considered using a loop for general 40m receive. What about 80m? My main QTH is very noisy on 80m.

Very good. I suffered from broadband internet noise from my telephone wire (not in use) which Ofcom investigated and said it had probably corroded and radiating.for many years and h.f. was killed for me with S8 noise 160m to 20m except 60m. I lengthened my 40m inverted vee for 60m. I made an indoor magnetic loop to null out the noise and that worked for me. The noise went down considerably when it was changed to fibre optic cable. G4GHB.

I built a 900 foot long Beverage receive-only antenna for use on 40, 80, and 160 meters. It turned out to be very good at resisting corona discharge during a thunderstorm that rendered a 40m Yagi useless on receive. Signal levels were lower than on the Yagi, but corona noise was eliminated.

✅ well done. 💙

Attn George Smart: Please add more ads to your webpage.

Awesome! I received an lz1aq loop amplifier and some tubing, just need some time off work to build it.

The loop tends to null out signals that are perpendicular to it, so it is possible that you could have had an even better RX on some of those weaker ones by rotating it.

I have a S3 or 6 noise depending on the band and etc. I have been looking for a receiver loop and my K4 has. Receive antenna input. Noting is perfect but hearing someone many listening much better.

I am sure you can also use that new SDR-switch for the same purpose of having a dedicated receive antenna input.

Build a air choke from coax. 6 meter coax around a botle or whatever. NOT the turns are importent. The 6 meter coax are. You need create reactence. Good Luck. Pa5dek.

wow!

Well done colinn, ive always used a vert on tx, and 40m dipole 3m high for rx, no noise now. One ant socket on the rig, no probs, made a tx/rx ant switch, works great. 73 mate.

Great job as usual Colin! Would be interesting to see if there was any difference whilst rotating the loop

wow what a difference. having similar noise problems in vienna.

I’ve been using a Wellbrook loop for years and on 60m it has been a godsend. I have some noise on 40m but the s/n is night and day over a wire antenna. Ideally you need a radio with a dedicated RX ant port. Loops in general are quieter than Marconi antennae.

email address to George Smart is not working..

Link does not work

Well done Colin. You're not the first person to crash a website 😂 🙈 Great A/B test. I've gone from a long wire to a multi band delta loop at home, where I'm surrounded by telephone and electric poles. Made a huge difference on receive. My old ft-847 only has one HF antenna connection though.