Photodiode light sensor (CB8271E)

This circuit of a 1964 Electronic Design uses a photodiode from the time. Modern equivalent can be used. The standby current is 1.2 mA.

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FM tunable antenna (CB7457E)
We found this antenna amplifier or Booster circuit in an Electronics Now from the 90s. The circuit...
Triggered oscillators (CB25028E)
In the figure we have 3 oscillators with logic gates that can be triggered by external logic...
15W Hybrid Amplifier (CB17493E)
This amplifier, common in 1986, uses a hybrid integrated circuit that can offer some difficulty to obtain...