Slow build QRP PA-2

I've been at this project for a while. But its slowly coming together. It is a QRP PA (2-3W output) for 40, 30 & 20m. It uses a MMIC pre-built module running on 12-15V, a set of three LPFs and an Arduino Nanocomputer to run things.

It provides TX RX switching and LPF switching from a two bit binary input on the rings of a a 4-way jack (the other connections are body GND & tip +5V. This input is compatible with my VFO output jack- this jack is used for GPS inputs when finding time and Maidenhead Locator, and as a TXRX/band command to the PA running other sketches which generate WSPR, JT65, CW, PSK, RTTY signals.





The display is simple, just the title "PA, the band big in the middle and TX or RX at the bottom.