valve amps circuits

This circuit utilizes a dedicated voice integrated circuit (AI) of the SK type, which incorporates an internal bistable multivibrator and three inverting amplifiers. The 555 integrated circuit (IC) A2 is employed for delay control. The described circuit is designed to...

Circuit diagrams for both a Bosch and a Delco-Remy Starter-Generator are available, noting that the circuits differ. Due to a computer crash, the original diagrams and the associated email address were lost. However, in May 2004, both the email...

This circuit enables audio monitoring of a remote location, functioning as both a room monitor and a baby alarm. It can be powered by a 12-volt battery or a mains power supply. The interconnection utilizes three wires, allowing for...

A high-quality preamplifier with tone controls consisting of three circuits. The NE5532 is chosen as the main integrated circuit due to its ultra-low noise properties, making it a popular choice in fine audio applications. Although these circuits are older...

The AM transmitter circuit consists of an audio amplifier and an RF oscillator. The oscillator is constructed around transistor Q1 and its associated components. The tank circuit, which includes inductor L1 and variable capacitor VC1, is tunable from approximately...

A telephone utilizes electric current to transmit sound information between homes. During a conversation, a steady electric current flows through both telephones, which share this current. As one person speaks into their telephone's microphone, the current drawn from the...