For those who would like to go the attenuator route to allow the 100 W PA to drive their amp at medium power, Phil Salas, AD5X, defined the parts for a nice 2 dB attenuator in: Aug 2010 - QST (Pg. 39) Simplify Transceiver to Amplifier Interfacing with an In-Line Attenuator Regards, Joel Hallas, W1ZR Westport, CT