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Aerial Photography and Video > Best downlink to use with Spektrum Tx
 
 
Pyrock
Key Veteran
Location: SF Bay Area

My Posts This: Topic  Forum		It's been a year or so since I've researched AP stuff on RunRyder so excuse my ignorance.

What is currently the best downlink system to use if you are on a Spektrum 2.4ghz flight radio and a 72 mhz gimbal radio?

900mhz? 5.8ghz? 5.3ghz?

Trex 500, Stretched Logo 10 3D, Ion-X, Gaui 200
07-02-2009 04:08 PM
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Pyrock
Key Veteran
Location: SF Bay Area

My Posts This: Topic  Forum		Also, why cant one use 2.4ghz for both systems? Is it any different than flying with dozens of other 2.4ghz aircraft nearby? Cant you just turn on the flight system first to "lock" it in then wait a minute later then turn on the downlink system?

Trex 500, Stretched Logo 10 3D, Ion-X, Gaui 200
07-02-2009 04:17 PM
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Pyrock
Key Veteran
Location: SF Bay Area

My Posts This: Topic  Forum		Will this work?

http://www.wirelessvideocameras.net..._no_camera.html

Trex 500, Stretched Logo 10 3D, Ion-X, Gaui 200
07-02-2009 04:25 PM
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Rappy 60
Veteran
Location: Houston, Tx

My Posts This: Topic  Forum
Quote 
Cant you just turn on the flight system first to "lock" it in then wait a minute later then turn on the downlink system?

No, you can't... Ill give you the quick version, the video bleeds RF all over the 2.4 Ghz radio spektrum. You should do a search and you will find ton's of information on this as it has been discussed to death several times over.

Dale

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07-02-2009 06:52 PM
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Hellsiege
Senior Heliman
Location: Colorado Springs, CO

My Posts This: Topic  Forum		+1 for what Rappy said. Someone once told me if you think about it like standing with your buddy next to a loud speaker at a concert. Your buddy is your 2.4 receiver system and the loud speaker the downlink. Yeah your buddy can still talk but you'll never hear him over the loud speaker.
07-02-2009 06:56 PM
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Griffo
Veteran
Location: Melbourne / Canberra, Australia

My Posts This: Topic  Forum		Go for the 900Mhz. It might pay to get an RF low pass filter for the 900Mhz tx antenna though.
07-03-2009 12:26 AM
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Pyrock
Key Veteran
Location: SF Bay Area

My Posts This: Topic  Forum		Thanks Rappy and Hellsiege!

Doesn't 900mhz require a HAM radio license?

Trex 500, Stretched Logo 10 3D, Ion-X, Gaui 200
07-04-2009 02:54 PM
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Rappy 60
Veteran
Location: Houston, Tx

My Posts This: Topic  Forum
Quote 
Doesn't 900mhz require a HAM radio license?

Yes it does require a license.

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07-04-2009 05:12 PM
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BigguyOz
Key Veteran
Location: Forster, New South Wales, Australia

My Posts This: Topic  Forum		But (catch22) isn't it illegal to use a HAM licence for commercial purposes?

Tony Stott
07-04-2009 05:48 PM
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Rappy 60
Veteran
Location: Houston, Tx

My Posts This: Topic  Forum
Quote 
 
BigguyOz But (catch22) isn't it illegal to use a HAM licence for commercial purposes?

Tony Stott
Scenefromabove.com.au

yes that is also correct. However it's a grey area for downlinks, as technically you are not using the dowlink to directly generate income. In other words, your not selling advertising or selling air time.

Dale
 

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07-04-2009 07:37 PM
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whitetrash
Senior Heliman
Location: Spain

My Posts This: Topic  Forum		What would happen if I go through a 2.4ghz wireless video beam while doing AP? Will it lock my Rx? I've been flying 35mhz for 5 years and had a couple of glitches in all this time.
I've been considering switching to 2.4 but would it be less secure to fly due to the large amount of 2.4ghz video signals out there?
07-04-2009 11:30 PM
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Rappy 60
Veteran
Location: Houston, Tx

My Posts This: Topic  Forum
Quote 
I've been considering switching to 2.4 but would it be less secure to fly due to the large amount of 2.4ghz video signals out there?

Unless you were flying 2 feet away from a 2.4Ghz source, you have nothing to worry about. 2.4Ghz radio lockouts are pretty rare compared to 72Mhz. 35Mhz may be a different story as I have not had any experience with that band being in the US.

Dale

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07-05-2009 06:14 AM
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