Reply To: BB66C Input Impedance Forums › BB Series Discussions › BB66C Input Impedance › Reply To: BB66C Input Impedance BruceModerator Bruce July 23, 2015 at 6:31 pm For anyone else that is curious, The BB60C has a 50Ω input impedance and AC input coupling so it won’t look like 50Ω using a multimeter but at RF frequencies it is 50Ω. The SA44B has a DC coupled input so it will look like 50Ω to a multimeter.Bruce
