Dual gate MOSFET RF amplifier built on a DIP 8 protoboard. (Using a BF998)
Linear Transmitter built on Raspberry Pi Zero proto boards. DC receiver routed on mini-mill.
Tiny Radio - About $10 USD in hardware and free full-featured software for complete control:
Supports DC and superheterodyne transceivers.
Emulates ic756Pro for computer control and has an advanced keyer.
Sources and documentation available at http://GitHub.com/aa2mz
Chinese Forty'9er converted to Dual Sideband transceiver