tape player amplifier (CB7301E)

Found in a 1968 Electronics World, this circuit uses operational amplifiers from that time.

| Clique na imagem para ampliar |

Adjustable Range Pass Filter (CB6730E)
This setting that applies to any operational amplifier was found in an old documentation. For the indicated...
Audio Frequency Meter (CB4867E)
This circuit was obtained in an old documentation, making use of an operational amplifier of the...
TNP10 Power Resistors (COM133E)
November 2016 - The new Ohmite TO-126 power resistors in the range of 0.09 Ω to 51 kΩ with...