28 Mar
2001
28 Mar
'01
6:51 a.m.
Since we're mentioning unusual crystal radios such as the Foxhole radios,
I'll just mention that there is one other type that always interested me,
though I never actually built one. These crystal radios include a
transistor amplification section, which gets the power to drive the
transistor from the signal strength of other local AM stations.
-Lawrence LeMay