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Aug 09, 2011, 11:06 AM
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Discussion

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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Aug 09, 2011, 11:30 AM
Village Idiot!
ScooterInVegas's Avatar
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.
Aug 09, 2011, 11:56 AM
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Daemon's Avatar
V is the way to go. Best mix of performance, light weight and low drag.

ian
Aug 09, 2011, 12:21 PM
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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.
Aug 09, 2011, 12:55 PM
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Daemon's Avatar
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
Aug 09, 2011, 02:17 PM
Registered User
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?
Aug 09, 2011, 02:36 PM
Village Idiot!
ScooterInVegas's Avatar
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!
Aug 09, 2011, 05:10 PM
Registered User
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
Aug 09, 2011, 06:21 PM
Registered User
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.
Aug 09, 2011, 07:36 PM
Village Idiot!
ScooterInVegas's Avatar
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.
Aug 09, 2011, 10:22 PM
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Quote:
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.
Aug 09, 2011, 10:36 PM
Suspended Account
For whatever it's worth, what we used to call the "inverted V" really


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