Forget the soup cans connected by a piece of string. There’s now a way to communicate wirelessly that doesn’t rely on a physical connection… or radio. It’s a communications platform that uses lasers ...
A rectangular black metal housing enclosing a transformer, two contacts either side. Nameplate reads: “Type R-14 Ratio 3 to 1 / All-America / Trade Mark / Audio Frequency Transformer/ Guarantee No.
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