Work in progress. A two band QRSS/WSPR beacon with a RPi Zero 2 W as the controller, two Si570 (I have too many of them left to buy any of those new Si5351 etc.), a LVDS to TTL converter (yes, those Si570s are the LVDS version), some BSS138 (class E PA a la G0UPL) and LPFs. Everything fits into the same nice 10cm x 10cm enclosure I used for my last project (SO2R Mini+). #hamradio #qrss #wspr