Please do check these out.

Alternative Detector for a shunt-fed Crystal Radio
https://nandustips.blogspot.com/2014/05/alternative-detector-for-shunt-fed.html

Compact Loudspeaker Crystal Radio
https://nandustips.blogspot.com/2016/12/compact-loudspeaker-crystal-radio.html

Horn Speaker for a Crystal Radio
https://nandustips.blogspot.com/2014/08/horn-speaker-for-crystal-radio.html

Regards,
Nandu.

 

Looks like a duplicate post from the 16th?
Max.

 

Why do you use a transistor and not a germanium diode?