Hi- I have an excellent Ameritron AL-572 amplifier with built in QSK board. Works as QSK amp or conventional PTT. Covers 160-10 Meters. Works excellent, but seldom used. Has ALC provision, but 80 Watts drives it fine. Includes manuals. Wired for 220 with plug. 1300 Watts from four inexpensive and rugged 572B tubes. $800 here. 73 de Dave in NH