I am just about finished with a restoration of a Drake T4XB transmitter. I need one part to be finished and that is the power off/on switch and gain control. It is listed on the schematic as: R79, 84 Control Var. resistor with power switch. The same part out of a T4X would be the same. Anybody out there have a old "Junker" or the part ? Thanks, 73 Gary