Schematic Power Amplifier and Layout

BF990A circuit and application Receiver tube Radio vcc 9v

Best car audio receiver Receiver tube Radio circuit using BF990A

Tube Audio Amplifier Circuit using EL34, 6SN7, 12AX7

BA1404 circuit diagram

This circuit functions with inaudible (ultrasonic) sound. Frequency to 20 kHz sound was heard by humans. The sound frequencies above 20 kHz is called ultrasonic sound. Described a series of produce (emit) ultrasonic sound frequencies between 40 and 50 kHz. Like the remote control system is also cirucit consists of a mini transmitter and receiver […]

12 volt light bulbs circuit for voltage monitoring using OR 2907, 3906, ADC122S101