Found in a 1980s documentation, this amplifier uses an integrated circuit that is not easy to obtain now as it is of the era. The circuit is intended for FI ceramic filter circuits.
November 2016 - NXP ARM Cortex microcontrollers for serial interfacing applications, NXP 32-bit...
This simple earphone receiver was sold in the 1960s in Japan. The circuit uses a single germanium...
Rumble is a low frequency rumble that occurs with turntables. If the reader recovers recordings on...