Auto Bias for FET (CB6125E)

This configuration is from a 1964 US documentation valid for any FET. The range of power voltages depends on the application.

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Second order high pass filter (CB7522E)
Using a 741 op amp with symmetrical source, this circuit was found in a 1982 documentation. The...
Door Alarm (CB6489E)
We found this circuit in a Popular Electronics of the 90s. The circuit can also be used as a seat...
Double tuning Pre-selector (CB9169E)
This circuit was found in a Popular Electronics from the 90's. The circuit has gained 10 to 20 dB...