This National Semiconductor circuit uses integrated circuits that are uncommon today. The circuit was obtained in a 90s documentation.
Other series amplifiers such as the MC3301, MC3401 and LM2900 can be used on this circuit. We...
This turntable filter was found on an 80's Elektor. The circuit makes use of operational features...
This preamplifier is recommended by Sanyo and is based on its LA3160 integrated circuit. The...