300 to 3,000 Hz Speech Filter (CB6543E)

Found on an 80's Radio Electronics, this two-section circuit is designed to pass the frequency range of the human voice.

| Clique na imagem para ampliar |

High impedance amplifier (CB7449E)
Suitable for the use with sensors, this circuit from National Semiconductor appears in other...
Audio Wattmeter (CB826E)
This circuit can measure audio output power up to 50 W. The circuit is wired to the output of an...
6 V x 1 A power supply (CB1157E)
This regulated power supply can provide currents up to 1 A to a load. The transformer may actually have...