The "Half Pint" is a easy to build QRP transciever, built with just 7 transistors. I've had quite a bit of fun building and operating this little rig. I hope you will enjoy it as much as I have.

It features a direct conversion receiver with an active audio filter.

Specifications

• Power supply: 9-20 volts DC
• Receive current: 35 mA @ 13.8 VDC
• Power output: up to 1 Watt on the 40 meter band, 500 mW on 20 meters, with 16 VDC power supply
• Receiver sensitivity: approximately 10 uV @ 10 dB S/N
• Audio gain: 42 dB + 20dB from Q-Multiplier = 62 dB
• Receiver Selectivity: less than 500 Hz

• 2.9" x 1.7" high quality double sided circuit board.  Gold plated.  Made in U.S.A.
• Quartz crystal
• Multi-turn trim pot to adjust filter Q.
• 20 machine pin sockets to connect to off-board components.
• Molded inductors, so no coils to wind.