Dipoles are often a go-to Antenna for many. But how much of a compromise is it if we have to squeeze in an inverted-V? Connect with my channel by subscribing and commenting.
Like going back to school. Except you learn something here!👍☘️
@Ei2iP
3 жыл бұрын
Hi Tim, I've a mosly 5 band yagi, with one element on 17M, little or no gain..It's 10M above the ground and I've worked JA a few times on 17M with 100w.
@alzeNL
3 жыл бұрын
Very intresting and really well explained. Can certiainly tell your an educational professional.
@harryszwergstatt2879
Thank U very much for this very interesting video!
@davidc5027
Жыл бұрын
In photography, we call a certain group of people "pixel peepers". This group of people look for pixels or specific details no one else "in the main" would ever see in a photograph. Well, I've noticed in ham radio, we also have a group of folks called "radiation pattern peepers". This group of people look for different radiation patterns, like between the inverted V and Flat top. Bottom line is, no one would be able to tell on the receiving end what antenna being used between the 2 antenna's. However, having said that, I feel this information is very useful from an academic perspective in learning how different things change as changes are made to the antenna. So, really good information. However, I can't stress enough the diagrams/FF plots etc. look larger than they actually are. Meaning many of these changes in signal strength are minor, but the graph makes it look like a huge change. Hope that is constructive in my best opinion :) Best Regards and 73
@kirkp_nextguitar
Some of your viewers might not know that antenna gain is the product of antenna efficiency and directivity. It’s helpful to consider those two contributors separately when comparing the two configurations.
@DonDegidio
3 жыл бұрын
Hi Mike,
@willian.direction6740
3 жыл бұрын
Great explanation re angle of the inverted V, I am hooking 2 metres extra tie off strings to my SOTA dipole ends and checking it this afternoon.
@hobbes1069
2 жыл бұрын
(copying to a main comment from my reply)
@bayusoeryocahyono6533
Thank you so much for your explanation about these kind of antenna. 😊 but some reason i still choosing inverted vee antenna:🙏🏻👍🏻 in the Bonsai type model😁
@ianxfs
2 жыл бұрын
Good analysis Tim 😀 I think in practice it would be hard to notice the sometimes subtle differences between the two 🤔 However, having two options gives you variations to get as much wire into the garden as possible and as high as you can , as these two factors will probably be more influential? I think the different mounting options of flat versus V is also a positive when it comes to what’s possible in the given space 👍🏻 Thanks 😀
@LeeKirkman88
2 жыл бұрын
I remember being a kid with not much money and having to make an inverted V and taped it to my bedroom wall lol. It was a bit directional but it worked.
@TheNoCodeTech
2 жыл бұрын
Very helpful thanks
@Roddy1965
3 жыл бұрын
These models are great, and show, I think, that they are basically equivalent because the point to point path and signal reliability will depend much more on conditions, which change unpredictably in both time and space, than the differences in these two configurations. That is, 1-2dB here or there, or a few percent here or there, on the antenna, is << than the environmental variability. Using an inverted-V (Spiderbeam multiband) with 11m apex, I was making 9000km QSOs 100W barefoot on 20m, 40m, and 15m, during the IARU HF.
@paulhastings3109
2 жыл бұрын
Have manual for AMNNA would like like to use it. Have a 5 band 2 element at 35 ft. Mosley - 33 - M- WARC at 60 ft.
@tonycampbell1178
3 жыл бұрын
Enjoyed our short QSO today. Hope the chores went well! 2M0TFP.
@markg6jvy135
3 жыл бұрын
Good explanation Tim 👍👏👏
@TheEmbeddedHobbyist
3 жыл бұрын
As an Antenna can't have a power gain it's all swings and roundabouts. Affective gain just means that the power you have is being funnelled in a particular direction. So if it's omnidirectional then the gain will be zero or less due to losses. hence to get high affective power gain you need to be able to rotate the antenna as the beam width will be reduced to a narrow angle.
@DustInTheWindAZ
Жыл бұрын
If the radiation pattern of a center-fed dipole is circular around its axis, can't it be turned to the vertical orientation to be an omnidirectional antenna? If so, how high off the ground would it need to be mounted? 1/2-wave (so the "top" would be 3/2-waves of the ground) or is it more important to have the upper element 1/2 wave off the ground( which would essentially have the "ground" side near the ground). In my case for a CB (11M) antenna.
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