Back to topic -- I see it uses a LM386 output with a JFET input conditioning stage.? A MOSFET is across the differential input of the LM386 to provide attenuation.? audio is sensed by a diode, that directly biases the MOSFET gate with a little RC conditioning.? It does require a little more surgery than the ND6T (minimal surgery) or VK3YE (no surgery) designs.? Useful solution perhaps for someone who has or wants to remove their audio amplifier.?
I confess my ubitx currently feeds a NESCAF with a LM386, now external.?
73 Curt
