The 2SB906 transistor is the subject of this 196 KB PDF. Following JIS designation, 2SB parts are PNP bipolar transistors classed for low-frequency use.

Named for the Catalyst Semiconductor 24WC129, this 74.3 KB PDF is catalogued as a schematic but serves as the part datasheet for a 128 Kbit class I2C serial EEPROM.

Simple preamplifier schematic built around the NE5532 dual low-noise op-amp, a 405 KB PDF; the extra tag in the name only marks the source site.

PCB artwork for the top side of an R2 class power amplifier rated around 500 watts into a 4 ohm load, saved as a 177 KB PDF.