HAM RADIO: FINISHED 80M Band Wire Spiral Loop - Magnetic Loop, Small Gardens, 

Thanks again!

Yes it is very talanted

Yes that the next challenge Roly, and the weekend is coming. cheers mate.

This is what separates the serious DXers from the rest of us; focus on the RX side of things as Roly is doing here...this is why Roly has the DXCC totals he has. 73! de WX0V

Agreed Andy, but if I needed the antenna to last as long as the need to use ferrules, I would have soldered the wires and done away with any mechanical joints altogether, the ferrules would have introduced another impedance point making the antenna less sensitive, however I do like the idea of Nylon. thanks for your input.

thank you

2 PC boards and a dry sponge! LOL That sir is the spirit of ham radio! Nice.

i built it for 11 m en i try it dry sponge and 2 pieces of a Coke can and a plastic bold from a toiletbril later i try it with a coax capacitor you can trim it to resonant freq it was a fun and educational project for me

I'll be trying with a jam-jar (OK, Aldi black olives jar, nice straight sides) capacitor, brass sheet rolled to fit halfway around inside and outside, supposed to be good for 10 kv or so!

Yep so far so good Paula

Thanks 👍

Thanks

I've bought a LOT of commercial antennas that are not built remotely as well as Mike's work. No where close. He takes pride in what he's doing. That much is obvious.

Oh wow thanks guys.

thanks Tom

Thanks 👍

Glad you like them!

Have fun

Cheers Steve

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@@mike-M0MSN thank you so much i love watching your channel and you building stuff in the kitchen and coffee in hand you and callums channels are very informative

Thanks 👍

Thank you

Yes she a good egg. :)

Go for it, cheers

No worries!

Thanks!

Sorry about that

thanks.

Yep will do, :)

Great question, possibly, build it and let me know.

Awesome, thank you!

Hi Mark, many thanks for the flowers, this coming weekend will be the true test of the wire loop

The copper twin loop is my preferred loop and is still in use today

You’re a ham. Try it. Share the results on RU-vid. :-) If you’re talking a vertical helix style. It should work. Narrow band though. Mag loops work best between 1/8 & 1/4 wavelength in circumference. Anything less and they’re efficiency drops. Anything longer it losses it’s electrical noise rejection characteristics on RX, The efficiency is related to the area inside the loop with respect to the wavelength, so a circle works the best, square is not quite as good at around 78% of the surface area for the same length of loop material. You also want low ohmic resistance at RF so surface area, not thickness. 1/2” copper would be the minimum, but 1” aluminium is fine, and much cheaper and lighter. I have a small back yard and I run a 10m end fed vertical for 20m with a 2m trap and extension for 40m I have a semi portable loop that has lengths of aluminium strap that are 3m, 4m, 5m and 8m long. I can use them individually for coverage of 40-10m or I can join them to go lower, which I have yet to try. The vertical takes up the least room, but is noisy on RX with the hash peaking at S8 with no filter and S3 with the CW filter. On TX it punches a good signal. The loop, on the other hand is only S3-S4 with no filter, and, provided it’s pointed in the right direction, is negligible in its difference on TX. I use a push up lighting stand to get it 3.5m off the ground. And a shot bag to weigh it down do it doesn’t blow over when there is a breeze. Given I’m on an inner city block, 5m wide and not that deep, (the residence is incredibly long) the mag loop and vertical have served me well, until I can figure out how to get something on the galvanised steel sheet roof 2 stories up :-)

Yes Stargate lol

yes!!

bet he wont post a vid of the tx test as it will be crap!.

Not to be used in the rain.

Something I should do MMANA. :)

probably not

@@mike-M0MSN I want to try and make a Loop Antenna like this.. Supposedly they work very well, better than an "End Fed Long Wire".. For me I would only be using it for Shortwave Listening.. No TX Required. So VSWR won't be an Issue. (However.. Building a Wide Band version) for 500 KHz to 30 MHz not sure if Possible. thanks for posting as it helps with construction methods.. 👍🏆

Yes simply put it is frequency dependant given the size of the loop.

Both Transmit and receive, with upload the next video Transmitting soon.

yep that's this coming weekend

In this case yes, however you can purchase the same plates from Etsy.com

That's the plan! maybe this coming weekend

I 3d printed them

Steel wire would be a poor choice. The resistivity of steel would add considerably to the feedpoint impedance making the moderately low efficiency even worse.

@@RobB_VK6ES Hi. I use 40-80 1/6 balun and plastic coated braided steel wire. I am not very satisfied. Likewise, having copper should be a great advantage.

click the website link and print the pages..

interesting idea

hopefully that this weekends plan

I have only done some short QSO around 300 miles this coming weekend is when I will give it a go.

The Cat helps but by just a whisker

Not yet this weekends work

Great idea with the feeder loop may try that, transmitting this coming weekend

@@mike-M0MSN I’m considering getting a power out for my Yaesu 991 a - Just wondering if you have any recommendations

Silversil Cyanoacrylate activator

The more capacitance the lower the Frequency, if you need it to work on 5MHz say you need to remove a turn of the wire......

@@mike-M0MSN I put some thought into that and am more confused. As I understand it, an antenna longer than resonant (resonates at a lower frequency) is inductive and requires capacitance to bring it into resonance at the (higher) frequency. Similarly, the short antennas are capacitive and require an inductor to bring them into resonance. Perhaps I have something upside-down in my learning. I'm great with computers, networks and autos, even medicine, but antennas seem to escape me! Edit... more reading and cogitation overnight (I normally work nights... night off) and I think I realize my mistake after reading a manual for (of all things) a MFJ loop tuner. They recommend cutting short and using their capacitor to resonate the loop at a lower frequency. I think the difference in the various discussions is whether the capacitor (or inductor) is in parallel or series it seems...

Thanks Ade :)

@DX Commander Might have to buy some for the one I tried a few years back. Never got it working as a antenna transmitter, but as a receive it worked well. You know if you turn on your radio without a antenna and tune the loops wit hit in the middle it will bring up the signal on the radio. Quite a neat trick .

Yes Ivan, I was.

you need to wind 2.5 meter on a smaller loop

next video ...... I think!

Etsy.com (SnowistCorner)

Thanks for the info!

-3db maybe I don't know

Love that!

Thats the plan ..:)

Many thanks!

Well hopefully I may get time to try it soon.

Hi Mat, give it a go you may surprise yourself.. :) 👍

Спасибо

Yes! Thank you!

Thanks 👍