The scope is reading the output of the last stage. pretty good signal.
The 4 Volt bus is 3.83 Volts. If the designer wanted he could use a pot instead of fixed resistors but I think it's close enough. Time to find out. I put the coil I made in the unusual IF post and a ear phone on it and lots of rush hissing in my ear. I used a screw driver as a core to adjust and I hear a weather report. I waited for the station ID and it was WWL New Orleans. I ask google and he said I am 135 miles from them. Not to bad my antenna is a test lead clipped to an AC duct.