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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Relative impedance meter (CB7487E)
Found in a 1960 Sylvania manual, this circuit can be implemented with a modern equivalent...
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This configuration, already presented in other points of this section and website, is of a...
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