Booster for preamplifier (CB6290E)

We found this circuit in a 1968 Electronics World. The circuit uses a transistor of the time providing a 16 dB signal gain with a 4 V output.

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Constant current pulse generator (CB7879E)
Found in a 1965 Electronic Design, this circuit generates adjustable pulses between 200 uA and 10...
L200 High Voltage Input and Output Regulator (CB15145E)
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Electronics Bench (CB17446E)
This circuit can equip the electronics practitioner's bench with an excellent number of resources. In...