TAPR has 80m and 160m WSPR transmitter kits available. These are similar to
the 10m/12m and 15m/17m WSPR transmitter kits in that the user solders the
low pass filter components to the pcb. In addition, the user also solders
the drain inductor for 80m and 160m transmitters. 80m and 160m WSPR
Transmitter Kits.