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Old 05-06-2003, 04:39 AM   #1
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Default 40fm futaba micro reiever-how long should the antenna be?

how long should the wire be?
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Old 05-06-2003, 04:52 AM   #2
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Join Date: Aug 2001
Location: Grimsby, UK
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hi there,

i worked it out to be 470mm or 230mm.

if anyone is wondering how you work it out:

>wavelength = velocity / frequency

velocity is the speed of light

put some numbers in

>wavelentgh = 3e8 / 40 e 6

= 7.5m

then you need to keep dividing by 2 until you get a nice manageable length. in this case 7.5m /16 or 7.5m / 32

and it is the same length as the wire on a fuataba!

hope that helps

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