Hi Mike, I have used a PIN diode T/R switch with good results using a DX-60 and a 2-B receiver. The power is not at the Valiant level, but that just means a higher "off" voltage for the diodes. The information for this BAQSK (Boat Anchor QSK) is on my website at www.k9ew.us under Projects. 73, ed - k9ew www.k9ew.us