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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.
This circuit from an old Argentine publication from the 1970s uses a power transistor to obtain an...
The amplifier presented with the TDA2003 can provide a power of up to 10 W (rms) in a load of 2...
This power supply provides a12 V stabilized output. The transistor must be provided with a good...