HBR/8B

All HF bands QRP CW transceiver. This is an improved version of HBR/3B.

• Covers 80, 40, 30, 20, 17, 15, 12 and 10 meters
• Classical single IF superheterodyne design
• Has just a few barely hearable (~S0) spurious signals
• Simple but effective AGC
• Supports RIT and XIT
• 10-30 WPM Elekey-B type keyer + straight key mode
• Keyer supports record and playback, programmable with paddles
• ~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-8b-transceiver/
• Demo: https://www.youtube.com/watch?v=GlcS9r8nLz4