afiskon/hbr-3b

QRP CW Transceiver

HBR/3B

QRP CW Transceiver

• Covers 30, 17, and 12 meters
• Easily modifiable for other 3 bands or all 8 HF bands
• Classical single IF superheterodyne design
• Free of spurious signals!
• Simple but effective AGC
• Supports RIT and XIT
• 10-30 WPM Elekey-B type keyer + straight key mode
• Keyer settings are saved in EEPROM
• ~5W class C power amplifier
• Has a S-meter and a SWR meter
• Open-source firmware, schematic and 3D-printable enclosure

Links

• Article (in Russian): https://eax.me/hbr-3b-transceiver/
• Demo: https://www.youtube.com/watch?v=xab1Q_SXZec