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This variable frequency oscillator was found in an old American documentation. Transistors allow more modern equivalents and coil data are found next to the diagram for several frequency bands.
We found this circuit in a 1968 Electronics World. The potentiometer should be set to trigger the SCR...
The Variable Frequency Oscillator (VFO) or Variable Frequency Oscillator shown in the figure can...
This circuit provides a power per channel between 6 and 10 W depending on the load. The circuit is from...