In this video, with some experiments, we shall see the meaning of "unbalanced" and "balanced" regarding transmission lines and their practical effects.
this is the best explanation of CMC and balanced vs unbalanced I have ever found! 73 John NM2R
@happydog6093
5 ай бұрын
I like the cow picture in your QRZ page. Thanks for the video.
@eddycuypers7621
5 жыл бұрын
Very good explanation. Thanks. We need more of this on KZitem. Most of Amateur radio channels, on KZitem, are very weak..
@johnpeterson7264
5 жыл бұрын
Great video. I especially liked the graphical explanations. Thanks for posting !
@joshtam58
4 жыл бұрын
The best explanation I have seen of this. Thank you!
@elijahsmith7552
2 жыл бұрын
Great video. Thanks
@kengerace
2 жыл бұрын
Excellent video
@ve6wo
Жыл бұрын
Thank you. Very good information! I also made a video in an attempt to explain this concept. Yours is very well presented.
@louisseaman8455
Жыл бұрын
Davide, please comment on my observation: @1:00 you show current flowing on the shield in a dummy load "system", and that has to be the case for a dummy load. However in an unbalanced antenna system, your counterpoise acts as the r.f. ground, thereby limiting the amount of r.f. that can travel on the coax shield; in fact, with unbalanced monopole antennas, some hams even make a choke out of the coax at the antenna feed-point, further reducing or eliminating the current that can travel on the shield, especially when they are operating at a frequency slightly different from the antenna's resonance. A perfect example of this is your demonstration at 5:30, where your antenna system has no counterpoise, and therefore your coax shield is acting as the counterpoise to the extent it can, since the current is not being shunted at the feed-point by a counterpoise; on top of that, there is likely an impedance mismatch at the feed-point, making the effect worse. In other words, you haven't created a matching load at the antenna feed-point, so some energy will naturally have to find its way back to the radio to complete the circuit, and that is energy that is wasted. At least this is what it seems like to me.
@hobbygaertner420
5 жыл бұрын
That was really good. I thought I knew this already but you taught me a new view point.
@vo1pwf
5 жыл бұрын
awesome job as always
@DE-iv8if
5 жыл бұрын
Very good Video!
@angeloinam8446
3 жыл бұрын
This is actually what I was looking for. Thanks
@hubercats
2 жыл бұрын
Excellent video. Thank you!
@actyon20
4 жыл бұрын
I...want to kiss your hands for making this video...I can't thank you enough *I am crying !!
@k2cwcqrp
20 күн бұрын
Excellent video, thank you! @3:10 the image shown resembles an end-fed half-wave (EFHW) antenna to me. In the case of an EFHW, something clearly DOES HAPPEN. So what is the difference between the image shown and an EFHW? Is there a ground connection in the EFHW?
@arthurleal2674
4 жыл бұрын
Very helpful. Tks ki5op. small yard, need to make antenna for 160M. Or G5rv Marconi configuration.
@markuss.1333
4 жыл бұрын
Great!
@volkerblock
4 жыл бұрын
Good Video! Thank you. What about at 6:28, if ARM 3 has length of a quarter wavelength?
@civillini
Жыл бұрын
grande da paura ..utilissimo per un radioamatore alle prime armi. grazie
@actyon20
4 жыл бұрын
At min 6:21 is at page 239 in Reflections III: Transmission Lines and Antennas which you can download as PDF for free from archive.org
@kb9oak749
4 жыл бұрын
My brain broke.
@zoolkhan
5 жыл бұрын
Wow, italian operator using a dummyload !! never seen this before. just kidding, dont hurt me :-) Well done Dave, mille grazie
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