4 ms·
For Crystal Radio Lover: Foxhole radio (https://en.wikipedia.org/wiki/Foxhole_radio https://en.wikipedia.org/wiki/Foxhole_radio) How to Make a Foxhole Radio:
by MrXOR 8y ago
For Crystal Radio Lover:
Foxhole radio (https://en.wikipedia.org/wiki/Foxhole_radio https://en.wikipedia.org/wiki/Foxhole_radio)
How to Make a Foxhole Radio:
https://www.youtube.com/watch?v=skKmwT0EccE https://www.youtube.com/watch?v=skKmwT0EccE
- brightball 8y agoI’ve been wondering how to do that for years! Thanks!
- 13of40 8y agoI read about, but never tried, an even more primitive diode for this: Burn sulfur on the end of a fine copper wire, then touch it to a piece of lead. Seems like you could do something with iron pyrite, too, but I can't remember the details. I'm sure they came up with a ton of these in the early 20th century that never made it into mass production. Edit: https://books.google.com/books?id=S1QyAQAAMAAJ&pg=PA46&lpg=PA46&dq=copper+wire+sulfur+lead+rectifier&source=bl&ots=VTJNHvvCGm&sig=roNipTzMhsT-Fv3o5HrtNN_IFF8&hl=en&sa=X&ved=2ahUKEwjR6s7-hsnfAhWn64MKHePDDi4Q6AEwD3oECAQQAQ#v=onepage&q=copper%20wire%20sulfur%20lead%20rectifier&f=false https://books.google.com/books?id=S1QyAQAAMAAJ&pg=PA46&lpg=P... Unfortunately it seems like you need a power source to initially condition the rectifier, which you might not have in a WWII foxhole.
- tubetime 8y agoburning sulfur on a chunk of copper will also make you a memristor. interesting effect...
- deleted 8y ago[deleted]
- MrXOR 8y agoThanks. very interesting, I'm gonna to make a memristor! https://news.ycombinator.com/item?id=9853984 https://news.ycombinator.com/item?id=9853984
- airbreather 8y agoA plain copper oxide to copper Junction makes a serviceable diode for a crystal set. Interestingly this is the main thing to watch out for with speaker wires - not the cable, it is the junctions that matter by far.