in PDF with the schematic diagram.
it is the for the Sangean ATS-818 CS
and the Radio Shack DX-392 is the same radio.
these are the versions with the cassette recorder/player in them.
but the schematic for the radio section should be the same for the
ATS-818 and DX-390
there are a few differences in the way the external antenna socket is
wired for these radios.
the first version has a stereo jack for the antenna jack, and and
external LW and MW antenna can be hooked up.