The schematic was traced back from original PCB by TB5CVN published here and should correspond to products sold as "ATS-20" and to some Si4735/Si4732 DIY radio PCB kits.
Values of resistors and some other information was taken from PCB photos by Robert Richmond available here
Schematic is available as a KiCAD 6.0 project and also in PDF.
Pictures folder contains original and upscaled versions of PCB layout pictures and also other board and unit photos
Unfortunately I do not have the device with me, so if you have one and can correct or add something - feel free to contact me or open an issue
Due to the fact that schematic was traced back from PCB pictures it may contain errors, so use this schematic at your own risk.
Also be aware that units you buy from chinese sellers can have all sorts of changes in PCB layout and schematics.
You can get more information about the Si4735/Si4732 radios from PU2CLR's Github page
ATS-20+ is a newer version of this device with some changes in schematic (most significant change is an addition of the FM filter and amplifier)
Schematic is available as a KiCAD 6.0 project and also in PDF.
Pictures folder contains PCB and unit photos