This is a simple tubed mixer from the 50's. The circuit does not include the power supply and has 3 inputs with independent controls. The tubes are double and the inputs are high impedance.
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...