metal on metal interference

[Stephen Jones]

Hi,

I remember in the early days of Radio Control that metal on metal was to be avoided due to interference.

Is that still true today with modern 2.4Ghz radio gear.

Steve.

[Peter Jenkins]

Some time ago, I read an article on this issue. I cannot remember who the author was or where it was published. The main argument was that the majority of noise generated in our model aircraft (metal to metal, electric motors, ignition systems) ceased by 300 mHz. So, at 2.4 GHz, these noise sources were just not an issue. I wish I could find that article! That was why 2.4 GHz radio with spread spectrum capability and LiPo batteries enabled an explosion in the take up of electric flight.

Can someone else provide a definitive response on this?

[gangster]

Another factor is that with the older ppm systems there was no way the receiver could differentiate between a burst of interference and a valid signal. A digital system ignores everything that is not a valid signal PCM was a step forward but not the overall panacea that some people thought it should be. Just because there were less glitches did not mean there was not a noise or interfering signal. (Papering over cracks comes to mind. Moving forward 2.4 gives the further advantages as described by Peter above. So many modellers however are still thinking in the old money. We need to remember that with digital television we can watch several different programs on the same channel

[Stephen Jones]

Thank`s for the reply`s guys,

Just a project i am working on will be fine then.

Cheers Steve.