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We found this circuit in the November 1992 issue of Radio Electronics magazine. The 30V power supply must be symmetrical and preamplification stages are included.
This 12 or 13.8 V stabilized source is suitable for experimental FM transmitters that require...
This circuit uses a TL071 to differential amplify the signals from a microphone and thus reduce...
Found in Motorola documentation from the 90's, this circuit charges the capacitor with a constant...