I built a crystal radio as a kid. As I remember it, you make a razor-blade diode by laying the razor flat and using the point of a safety pin as the cat's whisker. The book I read this in was similar to this article on "foxhole radios":
http://www.crystalradio.net/crystalplans/xximages/foxholeemergencyradios1.jpg A telephone receiver would be better for listening to the signal than trying to use an XO as an amplifier. James Simmons On Sat, Dec 4, 2010 at 5:38 PM, <fors...@ozonline.com.au> wrote: > >> Interesting...can you elaborate? (crystal radio was a childhood >> obsession of mine...) >> >> Sameer > > see > http://wiki.sugarlabs.org/go/Activities/TurtleArt/Using_Turtle_Art_Sensors#The_XO_as_an_audio_amplifier > > I was able to build a crystal radio from XO, wire, cardboard, plastic sheet > and foil except for the diode. Wikipedia says that rusty razorblades will > produce rectifying junctions but I couldnt make one. > > Tony > _______________________________________________ > Sugar-devel mailing list > Sugar-devel@lists.sugarlabs.org > http://lists.sugarlabs.org/listinfo/sugar-devel > _______________________________________________ Sugar-devel mailing list Sugar-devel@lists.sugarlabs.org http://lists.sugarlabs.org/listinfo/sugar-devel
