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Old Aug 09, 2011, 12:06 PM
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Vermont
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An idea of how to improve a heavy stock video tx antenna

Well Im sitting here with this heavy 3 dBi antenna for my lawmate tx and Im thinking. Its heavy, and the lawmate gets got, so why not shave weight off the base of the antenna while making it a heat sink? I'm going to get a patch or 7 dbi duck antenna so I have one antenna to mess around with. I was going to turn the base of the antenna with a drill while cutting off disk shaped sections with a dremel and a cut off disk. I would increase the surface area while making it lighter, but am not sure if it will interfere with function of it.
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Old Aug 09, 2011, 12:30 PM
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Im using the little stock antenna right now. It is really light. Maybe you could try an inverted V? They don't weigh too much.
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Old Aug 09, 2011, 12:56 PM
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V is the way to go. Best mix of performance, light weight and low drag.

ian
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Old Aug 09, 2011, 01:21 PM
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United States, WI, Poynette
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I was impressed with the performance of the stock antennas at first until I tried the inverted vee and a patch, much better! And as a bonus the transmitter runs cooler. I haven't tried CP yet, but I'm planning to.
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Old Aug 09, 2011, 01:55 PM
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For whatever it's worth, what we used to call the "inverted V" really
has nothing particularly inverted about it. It's just a V Dipole (or Vee Dipole) and most
sites list it as such now including IBCrazy's.
A traditional inverted V (name used for decades) is a type of antenna run
from up to the top of a tall pole and then diagonally back to the ground, typically used for
lower HAM frequencies.

ian
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Old Aug 09, 2011, 03:17 PM
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Vermont
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Cool, its still feels like a paper weight I think I am leaning to a V antenna and perhaps a patch antenna for the tx. What sort of range, unobstructed, would I expect with this set up? Just like ballpark?
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Old Aug 09, 2011, 03:36 PM
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Quote:
Originally Posted by Daemon View Post
For whatever it's worth, what we used to call the "inverted V" really
has nothing particularly inverted about it.

A traditional inverted V (name used for decades) is a type of antenna run
from up to the top of a tall pole and then diagonally back to the ground, typically used for
lower HAM frequencies.

ian
So when the plane is in a dive......Its an "Inverted V" ?? Cool!
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Old Aug 09, 2011, 06:10 PM
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Quote:
Originally Posted by Daemon View Post
For whatever it's worth, what we used to call the "inverted V" really
has nothing particularly inverted about it. It's just a V Dipole (or Vee Dipole) and most
sites list it as such now including IBCrazy's.
A traditional inverted V (name used for decades) is a type of antenna run
from up to the top of a tall pole and then diagonally back to the ground, typically used for
lower HAM frequencies.

ian
I built mine using the instructions on IBCrazy'y blog, Whatever it's called.
I think your right Daemon it's really not an inverted vee, it's just what I first heard it called. I wondered how it got it's name. As for range I'm getting 3/4 of a mile. I'm just starting out flying FPV, I could go farther but I'm taking it slow. I'd much rather fly a plane then look for it in mosquito infested terran. Been there done that, don't like it. Your results may and probably will vary.
Kent
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Old Aug 09, 2011, 07:21 PM
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The inverted or not so inverted dipole antenna is a 3 dBi gain antenna. The original antenna is also a 3 dBi gain ant, but I have a feeling with the "inverted" its still going to be the same as the original. 3/4 of a mile running 1 watt of power may not really be taking advantage of the real range of what one might think.
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Old Aug 09, 2011, 08:36 PM
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Quote:
Originally Posted by spacecase View Post
The inverted or not so inverted dipole antenna is a 3 dBi gain antenna. The original antenna is also a 3 dBi gain ant, but I have a feeling with the "inverted" its still going to be the same as the original. 3/4 of a mile running 1 watt of power may not really be taking advantage of the real range of what one might think.
V is better than 3/4 mile. I out to 2 with crystal clear video.
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Old Aug 09, 2011, 11:22 PM
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Originally Posted by ScooterInVegas View Post
V is better than 3/4 mile. I out to 2 with crystal clear video.
I agree, I have no problems with the video except maybe on a hard turn. I'm just taking it easy and enjoying it. Going a little farther each time when I feel brave enough. I'm hoping to get at least 2 miles someday. I'm using a 900mhz 1/2 watt transmitter with 72 mhz control.
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Old Aug 09, 2011, 11:36 PM
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For whatever it's worth, what we used to call the "inverted V" really
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