3 ms·
AM receivers can be so simple they don't even require a battery. https://en.m.wikipedia.org/wiki/Crystal_radio https://en.m.wikipedia.org/wiki/Crystal_radio
by dreamcompiler 2y ago
AM receivers can be so simple they don't even require a battery.
https://en.m.wikipedia.org/wiki/Crystal_radio https://en.m.wikipedia.org/wiki/Crystal_radio