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vova.gumerov
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Posts posted by vova.gumerov
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Klanon did you optimize this Biquad? If the 700-800MHz parameters are good, that would suit me. You need to accurately determine the dimensions. Internal clearance? Impedance? Preferably 75 ohm. Galvanized 0.5mm.
1 person likes this -
On 12.01.2022 at 15:36, Harry36 said:Установка границ вывода на диаграммах.
For the manufacture of this antenna, dimensions are needed
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CM 4251 original.
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Dear admin. Antenna Kovachev did not pass our simulation! Should opportunity fill this gap? The calculation was at 730 MHz.
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Jomy, what do you think about the second option???
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A masterpiece of antenna engineering
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Unfortunately, to this miracle, I do not have sizes
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Well, here's an option!
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What can you say about this commercial antenna???
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And the racks are all metal!
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Yes, very interesting! I have never seen such a construct.
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Thanks, it's really good now!
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The antenna was made for a friend living in the countryside. The repeater is 38 km away. The signal level is 90-95.
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Admin, please remove the extra photo. Load error
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The antenna design developed by the amateur radio operator V. Kovachev was first published in the Bulgarian magazine "Young Designer" No. 8 in 1992. As it turned out, it is also well suited for receiving DVB-T2 digital TV signals. Unfortunately, this antenna is not simple. Making it requires more time and materials than anything we've considered before.
However, according to the author, it has a noticeably higher gain than the three-element Sotnikov antenna (triple square).
https://antenna-dvb-t2.info/antenna_dlya_dvb-t2_8.php
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On 15.03.2020 at 13:41, Admin said:Your batwing is good! But I do not have enough sheet Al, can I shift up to 730? Why should I cover the entire range! Sizes will be smaller.
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Harry36, you are right. You can just turn on the Yagi calculator and get an antenna. But it's not that interesting !!!!
Harry36, I can't open any links on this site! The computer crashes, as if a virus has entered. That's why I asked for the measurements.
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Harry is 36, I can't open any links on this site! The computer crashes, as if a virus has entered. That's why I asked for the measurements.
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Jomi, the Yagi antenna you posted is called DIPOL, it's a Polish antenna. She is two meters, half of her in the picture !!!!
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Hello Jomy! You can try to make a simulation of half of the Dipol, remove 3 directors and make the tube through the boom, it's more convenient. It might turn out to be a small antenna.
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Greetings admin. It didn’t work out with the laid out Yagi! I prepared two more drawings for the little Yagi.
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this is serious.
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Klanon, I built the antenna exactly according to the dimensions from the book
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Jomy, delete the post! He doesn't belong here.
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in HF, VHF and UHF
Posted
Hello Jomy! I hope everything is fine with you. And we have a disaster ....... To make such antennas, you need a 3D cutter! Such things are not done with scissors and a grinder!