Preamplifier for millivoltmeter (CB7342E)

Found in an English publication in 1969, this circuit has a 600 kHz pass band. Ferranti's transistors support modern equivalents.

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455 kHz Generator with MOSFET (CB23991E)
We found this circuit in a Radio Electronics magazine from December 1969. The circuit uses a...
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We found this circuit in a 1991 publication. It is intended for low-impedance microphones,...
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