Red Hot 40 QRP

Red Hot 40 – Successor to the NorCal 40A Years ago, I built the 40M SST. Since then, the NorCal 40A and this rig – the Red Hot 40 have advanced the technology, designed by Dave Fifield, AD6A. Three things jumped out at me: Up to 7 watts output – the NorCal 40A is only 2 watts 70 khz coverage (twice that of the…