Big Receiving Loop - Introduction
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- Опубликовано: 18 июл 2021
- What would be more appropriate during the noisy summer conditions, than building a loop antenna that can improve your reception from 100 kHz to 30 MHz. Will it fit in your garden? And why are you putting antennas in your garden anyway?
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There's something almost mystical about a loop antenna. I've always wanted to build one and I probably will now after watching this series!
Love the loop antenna videos and info! Nicely done. Thanks! 👍⚡️📻
Thanks for getting loopy with my loop video.
Looking fwd to next, and all subsequent loop videos.. defeating VERY high noise level is my goal.. something in my area has recently been activated that all but blanks the entire spectrum..I will gladly sacrifice gain for noise reduction..thank you..
One of your great ones! Can’t wait to see the evolution
Great video, thanks for sharing your knowledge. Can't wait for the rest of the series. Been wanting to build an antenna of some sorts for a while.
Thank you for sharing your knowledge. 73 Bret/AC0AE
Love the video. Love that receiver even more. Gotta love rack mount gear
Mike , great work again, this will be some good info for all the Antenna nuts like me ! (HI) will be looking for other info on different feed methods ! Hopefully maybe for 160m ! Just a multi loop of wire ! Good luck , thanks , 73, Jerry K9UT
I like this how not to do it 😃
Looking forward for the upcoming videos/demos. Very interresting.
Thanks for the beginning of this in-depth look at receiving loops. Looking forward to more from you.
Tnx de Arnie W8DU
👍 Great video! Good information....
I tried to search for a Mae West, Emergency transmitter (WWII ?). I saw one in Tech School in 1967. It was known as a Mae West because of it's shape. It put out a rescue beacon for life rafts.
I have a bigish loop antenna here I made about 4 years ago. It's 80cm by 80cm square and around 15 turns I think, with some spacing between the turns. It is absolutely HOT on the AM broadcasting band. I must put it on a gimbal arrangement and perhaps play with it on 630m by switching in a fixed capacitor
Is it Coax or Wire? Tuned or Broadband?
Congratulations on your article in AR! It was an enjoyable read.Keep up the great work on the channel.
Christopher VA3NTH
👍I have a feeling that this loop antenna is going to be improved. Looking forward to next episode. On receive the core objective is all about signal to noise ratio for the desired signal. I suspect that a lot of hams judge antenna performance solely by signal level with rationale that if antenna A provides a higher signal level than antenna B then A is better. However, if antenna B has a signal level 3 S-points lower but a 10dB better S/N ratio than A, I would argue antenna B is the better antenna. Also, I wonder about using RX loops some distance from the shack being fed with co-ax. Even top spec. co-ax over distances of 100 feet or more will surely have more loss than balanced feeder for HF?
nice show thank you 73
Interesting series! I don't have a backyard so a loop antenna on my balcony is about all I can use. The catch is that it must be able to transmit at 100 watts and DX across the Pacific from Japan. A bit of a tall order perhaps but not impossible. I'm hoping this series will address those issues.
Замечательное решение.
You are quite right the loop antenna can decrease noise and static when turned it is quite evident on mine. I have one inside my house and one outside and turn then to get rid of major noise. I would need larger ones for transmitting but for receiving they work fine. But Mine is a Magna Loop I bought on ebay really small compared to you Coax loop but mine for what it is works better than the 134ft inverted V dipole I had up before.
a great video aerials are a bit of a black art well at least to me.
And all fairness I really believe when making these test comparisons, Loop antennas must be rotated. Just by turning it 90°, you might have improved your signal or attenuated some noise. I think it might be worth re-. ALSO, mounting the loop horizontally will give you interesting results.
great video how ever can you provide some info how to build what the size of the wood Fram is ? vy 73
This was fantastic. I was trying to learn about loop receive antennas and found this video. Is height important as it can be with transmit antennas?
Hi. I will see the series. Is very intresting issue. With your home broadcaster I worked more than 20 metters with a sony battery radio and a 2 meter diameter transmitting loop of 8 turns and a variable capacitor in parallel with a 2 loops link in the ferrite rood with a twisted pair as feeder.
Thanks to share your tech stuff. 73's from argentina
This sounds interesting. If you can provide any more details of this set up, it would be appreciated.
@@Steve-GM0HUU hi Steve. Okey. First i have built the Mike's home broadcaster. In the testing I've noticed the range is of 1-2 meters or less of five meters. Taking the problem the answer is that i haven't at least a quarter wave antenna. This mean a 75-100 meters wire! The solution is a magnetic loop antenna. On a circle made of a 4 meters strip of fiberglass of about of one inch width i wound 5 turns of 1.5 mm enameled copper wire. In the two terminals a variable capacitor of 365 pf and a twisted pair of cable to a couple of turns link in the ferrite rod in the home broadcaster. Thir ressult in an about 1.5 meters loop which makes the range to more of twenty meters. I hope to help you. the never ended project is to replace the ferrite rod anntenna coil in the home broadcaster directly with the new external loop making a tap to have a big oscillating coil. maybe you can experiment this. this idea was taken of the old radio broadcast issue in worldradiohistory site.
Note: in the link many turns cause the need to exact tune the loop at the exact transmitter frecuency, else the oscillator will be pulled away and less turns will allow certain misstunning but less radiated power.
sorry for my very bad high school english!
I hope helped you and I send you best wishes.
73's Steve.
I always terminate my 75 Ohm coax with F-connectors and then use an adapter. Makes no diff either way.
Also Mike, have not been getting notifications of your videos even though have 'ALL' selected.
I will try to monitor your channel closer!
73...
It would be interesting to put the loop onto an RF antenna analyzer and see the resonant points are.
Greetings from VK2 land.
Just one observation on your tests.
To get an accurate result between the loop and dipole antennas, shouldn't they both placed parallel to each other i.e. receiving from the same direction?
If not, the loop by facing the 'wrong' direction, will appear to be in a disadvantage compared to the dipole.
Very interesting and informative video though..many thanks! VK2Bxx
Hola..ojalá algún día se pudiera poner subtitulado Español..ya que videos asi son interesantes..gracias.
I only use magloop antennas
I simply do not think that having to have something demonstrated and explained is in the same ballpark as something which is explained first and demonstrated later.