The heart of the D-808 is the DSP chip. This is the same chip found in the Tecsun PL-330 and PL-990. Luckily, Silicon Labs publishes the official datasheet and application notes for the Si4735 (easily found via PDF search). This datasheet acts as a pseudo-schematic for ~70% of the D-808's functionality, including:
The D-808 is a receiver based on the Silicon Labs Si4735 chip. It uses two main circuit boards connected by a ribbon cable. xhdata d-808 schematic
: A large "loopstick" antenna dedicated to Medium Wave (MW) and Long Wave (LW) reception. Telescopic Whip : A 27-inch antenna for FM, Shortwave (SW), and AIR bands. External Jack The heart of the D-808 is the DSP chip