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Pititico, QRP CW transceiver designed by @py2ohh . One of the smallest and simplest transceivers designed around a single 2N2222 transistor. This was somehow an improved version from the first one I built. Still it was not exactly what I was trying to achieve at that time.
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.
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73, YO6DXE
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DOWNLOAD PROJECT FILES:
https://28-north.com/download/20769
PCB BOARD:
https://www.pcbway.com/project/shareproject/Pititico_CW_Transceiver_9236200a.html
VIEW ALL PCB PROJECTS:
https://www.pcbway.com/project/member/?bmbno=53B53FD5-B8E9-44
MORE ON PITITICO:
https://youtu.be/VueyJq14W2g
FINAL VERSION:
https://youtu.be/jlPVHYvhFCo
NEW VERSION ( Pititico 2 ):
https://youtu.be/n1X8Pv22NCE
https://youtu.be/n1X8Pv22NCE
David ( DL1DN ) built a modified version for the 10m band, so feel free to do modifications for other bands as well.
DL1DN VIDEO:
https://youtu.be/Tp8TtUqGTXc
DX EXPLORER:
Videos on homebrew amateur radio gear that will hopefully inspire you into crafting your own unique radio projects.
QRZ:
https://www.qrz.com/db/yo6dxe
#amateurradio #hamradio #electronics #pcbway