Amplifiers

A Lightweight 400 watt FET DXpedition amplifier (pdf)

Antennas

Optibeam OB10-3W review (RadCom)( pdf )

Optibeam OBW10-5 review (RadCom)

 

A 160m Tee antenna

A 40m 4 square Part 1 (RadCom)(pdf)

A 40m 4 square Part 2 (RadCom)(pdf)

The above includes a simple phase detector for setting up 4 squares

A discussion with an antenna master Frank G2QT (SK) (RadCom)

Elecraft K2 projects