It would probably pay to do some basic RF shielding things anyway. I was
originally thinking in terms of putting your device into something like a
metal film can, you know those aluminium cans 35mm flim used to come in, but
these are hard to come by these days, and the weight penalty is probably a
bit much. However you may achieve similar shielding by wrapping it in a
single layer of duct tape or similar metal adhesive tape. This should
minimise any radiation without too big a weight penalty.

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