General Inquiry/FAQ thread

[FPVdude]

I have another question! If I coil up coax cable (the RCA video signal cable between goggles and receiver, is that even called coax?) and put a zip tie around it, will I suffer any weird problems? I have had weird things happen when I coil wire before, but those were unsheilded wires. I could shorten the cable, but that would be a lot of work. I don't want to accidentally short the coax..
thanks!

[HF_ATL]

Just built my 1.3GHz biquad... Before testing it, any comments Alex?




- Reflector: Fibre Glass Copper Clad PCB 233x220mm Single Sided
- Copper wire 1.7mm thickness
- Using two nylons bolts
- RG58 coaxial cable
- Center conductor is soldered very close to the mesh, without touching
- Mesh soldered way down to the copper in the reflector (also soldered mesh between the bowtie and the reflector to stiffen it)


Thanks!

[IBCrazy]

^That looks mighty good. When you fly it, be prepared to be impressed. Contrary to popular belief, I still fly a BiQuad eventhough it is linear

-Alex

[IBCrazy]

I have another question! If I coil up coax cable (the RCA video signal cable between goggles and receiver, is that even called coax?) and put a zip tie around it, will I suffer any weird problems? I have had weird things happen when I coil wire before, but those were unsheilded wires. I could shorten the cable, but that would be a lot of work. I don't want to accidentally short the coax..
thanks!

You can coil it up. It actually can be a good thing. It cuts common mode currents.

[HF_ATL]

Thanks Alex! Will report back my results!

[msev]

Alex I would like to point you to a question that is bugging me for quite some time, its here: http://fpvlab.com/forums/showthread....l=1#post102151

Edit: Nevermind I already got an answer!

[FPVdude]

I am planning to build a 910mhz helical (huge!) and the reflector plate is supposed to be 12.9 inches wide. However I only have 12 inch wide sheet metal. How should I join 2 pieces to make the full 12.9 inches? I was thinking maybe soldering but that would be a lot of soldering or can I just skip the .9 and make it 12?
thanks!

[Mechnan]

It will loose a little of gain, but it's negligable, you probably wont notice it.

[FPVdude]

More questions sorry...
I saw your running the gauntlet video and i'm impresses by the durability of the specter. Took a reasonably hard hit without that much damage. Did your cloverleaf take any damage? if not, how did you mount it? I have damaged one but luckily it wasn't that bad- however it would be terrible it it shorted out so I don't want to take chances. Thanks

[IBCrazy]

That cloverleaf got smashed at least 5 times and I had to bend it back. I mounted it on top of the plane like an idiot. I am using a nylon center fill for durability. They don't break very easily. The original units weren't nearly as durable.

-Alex