Error Amplifier and Trigger Generator (CB19981E)

This circuit was found in old documentation. The components can be replaced by modern ones. The circuit is used in power controls.

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Line amplifier (CB6992E)
This circuit was found in ancient American documentation. It provides a 70 Vpp signal at...
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The figure shows a Wien Bridge circuit with non-linear feedback. The resistance of the RL lamp is...
Crystal Oscillator for the 2 meter range (CB3929E)
Found in documentation for radio amateurs of the 70's, this circuit generates signals from 18 to 24...