Electronică

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an old radio sitting on top of a wooden table
The GlobeSpan World Band Receiver
The GlobeSpan World Band Receiver
an electronic circuit diagram showing the current voltages, and other components for each device
Modern Radio Receiver Architecture: From Regenerative to Direct Conversion
an analog generator with different knobs and gauges
RF Signal Generator
This is an RF Generator that was invented around 1912. This was meant to have all of the radio receivers all fall in line. This was focused on having people be able to connect with AM Radio Stations of about 5 different ranges. The first range is, Range A which covers a radio frequency of 150 KHZ (KilaHertz) - 500 KHZ. Range B went about 350 KHZ to 1MHZ (mega hertz). Range C was about 750 KHZ- 2.25 MHZ. Range D was about 1.6MHz - 5MHz. Lastly Range E was about 3.5MHz - 12MHz.
an electronic circuit diagram with two different components
an electronic device is sitting on top of a wooden box with wires attached to it
F6HCC
an electronic device with some wires attached to it and another wire connected to the board
2N2222 Regen