We found this simple toy organ circuit in the February 1968 issue of Radio Electronics magazine. The transistors were common at the time and the transformer was from a transistor radio output.
Found in National Semionductor documentation this circuit combines a tone control with an...
This circuit was found in American documentation from the 90s. It serves as an amplifier for a...
With a coil formed by 7 turns of 26 AWG wire this circuit operates in the 27 MHz range. But you...