30 Mar
2001
30 Mar
'01
2:44 a.m.
Sure, albeit a less "authentic" one. I've always heard that
germanium diodes are better for this (does this have something to do
with their forward voltage drop of 0.3V vs. silicon's 0.7V?)...like
the venerable 1N34A.
-Dave McGuire
Yes... A silicon diode will require a stronger signal to overcome the .7
volt threshold.
Since we've already violated the purist aspects by using a semiconductor
diode, you could use a battery to apply a forward bias to the diode. In this
model, the signal doesn't need to overcome the entire .7 volt forward bias
voltage and makes a radio that is MUCH more sensitive.
Steve
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