Tuning methods in a crystal radio (9-Analog Electronics)

[@franzliszt3195]

At the 4 minute mark he says the 1N37A is the most used. He has a typo; its a 1N34A diode. Note, if you go to Amazon or Ebay many diodes are advertised as 1N34A, but they are not. 1N34A is not a trade mark and, what, you going to sue a guy in China?

[@oakspines7171]

Thanks.

[@CASHSEC]

Why don't all the radio waves in the air interfer with each other.