26-08-2013, 10:41 AM
Here's a link to a short video showing an SBL1 double balanced mixer pertaining to AM breakthrough, note that there is no front end bandpass in this setup, the antenna is straight in.
LO injection is by way of a bench signal generator, I could not quite understand all that he said but from the looks of it he had an adjustable high value inductance on the output port (AF) circuit of the mixer, I have heard that the output port impedance matching on these devices is quite critical for proper operation, just food for thought.
https://www.youtube.com/watch?v=_bs04kC8r84
Lawrence.
LO injection is by way of a bench signal generator, I could not quite understand all that he said but from the looks of it he had an adjustable high value inductance on the output port (AF) circuit of the mixer, I have heard that the output port impedance matching on these devices is quite critical for proper operation, just food for thought.
https://www.youtube.com/watch?v=_bs04kC8r84
Lawrence.