On Friday, December 28, 2018 at 10:51:50 PM UTC-5, Phil Allison wrote:
In the 1960s, transistor radios and came supplied with crystal earpieces.


.... Phil

Those crystal diode radios we all built when I was a kid needed those earpieces. Had to wind wire on a tube, etc.

Now kids are probably doing SDR instead, at least the nerdy ones.