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February 28, 2014 — by WEBOOST
We love Thursday so much. Can you guess what this week’s #TBT is of?
Let us know your guess in the comments section below or on Facebook/Twitter, and you could win our Sleek 4G!
Robert Robinson on March 3, 2014 at 8:53 pm said:
The device is a cat’s whisker detector. A fine wire “tickles” the surface of a galena crystal until an active spot is contacted allowing it to act as a detector. In the 1950’s I had a crystal set radio. Connected to a long wire antenna and a ground, I listened to AM radio with high impedance headphones. It was self powered.