Disk archival techniques

[Tony Duell]

> 
> > Or at least I am darn sure I could still make a crystal set the hard way
> 
> The amazing thing some WWII POWs did was to make a radio detector
> with a rusty blue razor blade and a short piece of pencil carbon.
> Or was that some Poles.  Poked around with the razor blade to hit
> an actively-rectifying spot, ala galena cat's whisker.

That's (partly) what I meany by 'the hard way'. Using a ready made diode 
is the easy way (although I'll bet a fair few so-called engineers 
couldn't make an AM receiver even using such a diode).

Another detector that was tried was similar to the normal galena + cats 
whisker one, but using a lump of coke (the fuel, OK :-)) instead of the 
galena. Apparently if you get the right spot it'll work as a poor diode.

-tony