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You bet extreme swings in temperature are tough on electronics.
Most manufactures of equipment that must operate in the highest highs and the lowest lows test all their product in environment chambers.
The temperatures are ramped up and down in an attempt to get the product to fail. Sometimes shaker tables are used and humidity can be added and taken out.
Cool stuff to work on. Some that I have seen get down to -85 deg C or better and can pull down from room temperature in 30 minutes.
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Bill K.
"I started out with nothin and I still got most of it left...."
83 911 SC Guards Red (now gone)
And I sold a bunch of parts I hadn't installed yet.
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