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TL;DW guy builds a passive AM diode receiver; hand-wound inductor. This is pretty much the first receiver topology that EE undergrads who take a first course i
by metaphor 8y ago
TL;DW guy builds a passive AM diode receiver; hand-wound inductor.
This is pretty much the first receiver topology that EE undergrads who take a first course in comm systems analyze in any detail. It's also a fun way to get a kid interested in electronics.
- anadem 8y agoYeah, I made and listened to a crystal radio as a kid in Britain. With a big antenna hung outside between trees I could listen in bed to Radio Luxemburg! (this was in the days when the BBC was the only broadcaster in Britain; Radio Luxemburg let me listen to the pop music the Beeb didn't play). And yes, later I went to an EE course at uni!
- 01100011 8y agoIt's also kinda fun to use them to sniff your various electronic devices. I remember holding one up to my old Amiga 500 and listening to the emissions it was producing.
- kabdib 8y agoMy home-brew Z-80 system, with dozens of unterminated copper traces wiggling rail-to-rail square waves at 5 volts in an unshielded cabinet, wiped out TV reception with herringbone patterns for a couple houses around. It was the 1970s, nobody knew it was me, practically nobody had computers at home or the knowledge of electronics to make the connection. Ironically I could turn it on today and no one would notice (unless it totally wiped out wifi, which seems unlikely).
- rini17 8y agoMaybe wireless car keys. People would notice they are jammed, one time it did happen to me and neighbors. But I think the perpetrator was not caught. Also, FM/AM radio is still widely used.
- jacquesm 8y ago> FM/AM radio is still widely used. But not nearly as wide as it used to be. The bands from LW all the way to 108MHz were absolutely crammed with stations. I got one of my sons a second hand world radio set and it is actually pretty barren on most wavelengths.