When Lady Hillary makes yogurt, she turns the oven light on. That provides enough warmth to slowly develop the yogurt with no need for high heat. I suspect that's the drying method he used for jerky.

We also make lox by brining salmon in a salty mixture with sugar and artificial smoke for a day or so. We learned this from Dick and Susan.

The same method also works with electronics that have gotten damp in rain or other fresh water. If it's salt water just buy new gear as there will be all sorts of new ways for the circuits to blow themselves up.