Night Binoculars
Why do my night vision binoculars whine?
I bought a pair of 1st generation Seben binoculars and am curious as to what causes the whine when they are active. I understand the principle behind how they work, but what causes the whine?
I have night vision stuff because I like nature and I like gadgets.
Image intensifier tubes require a high voltage source to operate. I’d guess your binoculars use something like a high frequency flyback transformer to provide that voltage.
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