Antennas

[Todd lubbock]

Trying to find out or understand the reason for the different colours of the antennas for the p3 standard both ac and Rc and how can you test to see if faulty

 

[cheddarman]

In both cases the antenna is just a bit of wire "tuned" to the transmitted frequency, in this case 2.4Ghz.
RC and AC both have two, linked antennas, in the RC the two little projections from the rear and on the drone they run down the front legs.

A full wavelength at 2.4GHZ is 12.5 cm. and this seems to be the length of the "bits of wire" for drones. (I think my calculations are right ?)

Different colours, no idea, colour will make no difference to performance, it's the copper wire inside that does the work. Mine are all grey.

 

[kndll]

The P3S has one antenna in one leg for command signals , to and from the RC , the other antenna is for video transmission back to the RC.

 

[Todd lubbock]

So the two inside are for wat purpose then and how do you tell a 2.4 antenna apart from a 5.8

 

[cheddarman]

"Two inside" where Todd? Picture?
2.4Ghz will be approx twice the length of the 5.8Ghz. The 5.8GGhz may not even look like an antenna as you know them as they tend to be a stub antenna.

 

[Todd lubbock]

This is wats inside mine the square ones attach to my gimbal and the other 2 to my rx

 

[Todd lubbock]

And my rc

 

[cheddarman]

THIS is quite a good demo on antennae replacement. My P3A is slightly different to this, my RC has two antennae coming out of the top, both for the control side off flying. I'll have a look inside later on............