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Question for Wiring a 2.4Ghz system

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:unsure: Hi Everyone:

I have a question for wiring a 2.4Ghz System regarding the wire AWG that should be used. I thought I read somewhere that there is a minimum guage wire that should be used to reduce RF noise. I wired a system with 24 AWG Wire and it seemed fine, but I wanted to reduce the size to 28 AWG becuase it it lighter and more flexible. The components in the system are a small Sony CCD a 11.1v, 480mAh Lithium Polymer Battery and a 200MW Transmitter.

Thank you for any advice that you can give.

Best,

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There is no single answer. If the 28AWG works for you then you are on your way. However, if you run into noise/interference issues then keep in mind that low impedance power paths are needed to help minimize the EMI/RFI. That is done by using heavier wire and shortest possible lengths. It is all a matter of trying what you want to use and seeing what happens.

Frankly, if it was me, all the power wires would be * at least * 24 AWG and kept very short. Perhaps under 5" or so. A/V signal wires can be smaller gauge, but they should be short too. If longer wires are needed then just minimize them as best as possible.

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Oh dear, I'm not sure I wanted to learn this! On my plane the camera is mounted near the polyhedral break, and I'm glad that in my ignorance I ran the wires all the way back to the fuselage (about 16"). I would have been hard put to balance the plane without adding a lot of weight if I had put the video TX and battery out by the camera!

I did twist the video and video ground together, and the camera power and power ground together -- pretty much letting my experience with Cat5 and Cat6 cable be my guide. That stuff (Cat6 cable) works at much higher frequencies than what we encounter here, even in video.

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That stuff (Cat6 cable) works at much higher frequencies than what we encounter here, even in video.

The CAT5/CAT6 works well in PC data comm apps because it handles low level differentially driven signals.

Keep in mind that wireless video EMI/RFI problems, if present, are not just sourced from composite video. The microwave RF from the video transmitter will often be conducted throughout the wiring too. The typical R/C Rx is not well equipped to deal with excessive RF interference, especially since it is just a few inches away. So, be careful with the installation.

If an installation can be cautious then that is the route I would suggest. When the requirements do not allow it, then don't be alarmed if some EMI/RFI suppression will be needed.

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