Steam locomotive (T315E)

This 1967 modeling circuit mimics the whistle of a locomotive. The steam-shrieking wheezing is set in a 2k2 potentiometer.

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1 to 2 W Amplifier (CB4760E)
We found this circuit in an old Radio Electronics. Components can be replaced by modern...
Two meter amplifier (CB8980E)
This circuit for the two-meter band of radio amateurs was found in 1980s documentation....
Bar Generator (CB8742E)
This circuit is used to generate pattern bars on an analog television screen for calibration...