The operational 714 (not the 741) is an old Raytheon type that is no longer common today. The circuit can be implemented with modern operational. The power supply must be symmetrical.
This symmetric 30 mA x 15 V power supply was found in the Ferranti transistor manual from 1974....
We found this probe circuit for frequency meters up to 10 MHz with a sensitivity of 10 mV, which...
This circuit is from a cookbook to timers. The circuit is triggered by an external signal and,...