Worlds smallest transceiver

Miguel, PY2OHH, has published the details of the “Pititico” (means very, very small in Portuguese)

This is an xtal-controlled, 1 transistor (2N3904 or similar NPN) , 40m CW-transceiver. TX output is 700 mW and audio is supplied through an earphone.
 

Interesting to read that Miguel has managed to make (at least 3) QSO’s with this tiny QRPp rig.

 

http://py2ohh.w2c.com.br/trx/pititico/pititico.html