Pititico, QRP CW Transceiver Designed by PY2OHH

Pititico QRP CW transceiver designed for the 40m band. One of the smallest CW transceivers designed around one 2N2222 transistor by ‪@py2ohh‬ This was the first one I built trying to stay close to the original schematic.
Latest update: I ended up changing the circuit a little for easier adjustment of the TX/RX offset frequency, to remove the AM broadcast band interferences and improve the low pass filter. Check the blog article for details and the latest schematic and PCB board design.
73, YO6DXE
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DX Explorer is a channel with amateur radio related videos on: schematics, reviews, homebrewing and much more.
I am passionate about amateur radio since childhood. I got back into the hobby in 2016, while living aboard my sailboat. I received my license in 2022. I like QRP mostly, experimenting with all modes. But I am old school, so I prefer SSB or CW.
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