@SFOMuseum Twitter Posts Tagged Crystalradios This is SFO Museum's archive of the @SFOMuseum Twitter account. See all the tags or all the Twitter posts that have been archived so far.

#Crystalradios did not operate from batteries or household current-they relied on a semi-conductive mineral known as a crystal and simple circuitry to harness energy directly from radio waves in the air. #RadioSFO This tweet was posted on March 21, 2018.