Crystal radio help anyone?
I was reconsidering making a crystal radio the past week and so I set out to research the topic on the 2nd most popular information database on the internet which comes out of the 1st most popular one. According to wikipedia, all you need is one diode in order to split the AC signal coming in via the antenna in half, therefore it uses half-wave rectification (it's not quoted; it's what I understand from it). Could full-wave rectification be also used? Like connecting the antenna to a bridge rectifier (aka. diode bridge, aka. 4 diodes stuck together)? I know that half-wave rectification yields pulsed DC, but I also don't understand how. By that I mean what happens to the other half? Does the other half of the wave connect directly to the output? One last thing, I know the largest metallic object I can ever use as an antenna is basically just my roof, but then I don't like coming up to the roof and looking for some exposed metal to connect to. Any thoughts on what huge, metallic items I can use in my household? I've already thought up a list of what I could use for an antenna:
-Extremely long piece of wire (I have an 8 meter long CAT5 cable going from the 1st to the 2nd floor)
-My front gate
-Sheet metal laying outside my front door (not the gate)
Here is the summary of all my questions:
-Is this wikipedia article true? (see at the list "semiconductor" area)
-Can full-wave rectification be used on such radios?
-In the case of half-wave rectification, where does the other half of the signal go?
-What can I use as an antenna (excluding my roof)?
Aside from the asked questions:
-Is there any other way to tune to a particular frequency?
-I'm asking opinions to people who know what they're doing (no offense to beehard44, this is more of a poll that anything else).