CATV amplifier (CB9409E)

Found in a 1969 Electronics World, this circuit is intended for amplifying analog cable TV signals. The transistor supports a modern equivalent.

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Optical isolator (CB9165E)
This circuit was found on an old EDN and can be used as a shield. Optical couplers are from the...
Band Pass Filter with Multiple Feedback LM158 (CB4482E)
We found this circuit in Motorola's 1993 Linear Interface ICs. The power supply does not have to...
Variable High Pass Filter 23 to 700 Hz (CB25821E)
This high pass filter was found in the February 1996 Electronics Now magazine. The circuit...