How can electronic devices be protected from radio interference?

[Wolfbox]

What electronic devices do you bring when you off-roading/camping/hunting?
Do you have any practical ways of protecting electronic devices from being intervened by high frequency radio? It would be much appreciated. Thanks.

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[Jager]

Depends upon transceiver frequency, position and type of radio antenna, transmit power level, and susceptibility of the electronic device.

A conductor - and that means anything metallic, not just "wire" - longer than about 1/10 of a wavelength begins to act like an antenna. That's how various devices "pick up" RF interference.

A tenth of a wavelength at 2m - the most common ham band for mobile applications - is around 8 inches. A tenth of a wavelength at GMRS frequencies is around 2.5 inches. So, yeah, it's not hard to get into an arena where inducted RF begins to become a problem in some devices.

Ferrite cores of the correct "mix" for the frequency of concern can often be used to good effect if the affected device is amenable. At the design/PCB level, incorporating an effective ground plane can help.

Turning down Tx power won't stop induced RF, but it may dial down the interference to an acceptable degree.

Ultimately, it depends upon the kind of radio and the kind of affected device. There's not a simple, one-size-fits-all solution.

 

[chaosmarine92]

From what I've seen that others have posted, the AC outlets being on makes a lot of RF noise. So any radios need their own batteries.

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