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  2. Grundig - Wikipedia

    en.wikipedia.org/wiki/Grundig

    Grundig started as a typical German company in 1945. Its early notability was due to Grundig radio.Max Grundig, a radio dealer, built a machine called "Heinzelmann", which was a radio that came without thermionic valves and as a do it yourself kit to circumvent post war rules.

  3. Trevor Baylis - Wikipedia

    en.wikipedia.org/wiki/Trevor_Baylis

    Trevor Graham Baylis CBE (13 May 1937 – 5 March 2018) was an English inventor best known for the wind-up radio.The radio, instead of relying on batteries or external electrical source, is powered by the user winding a crank.

  4. Circuit diagram - Wikipedia

    en.wikipedia.org/wiki/Circuit_diagram

    A circuit diagram (or: wiring diagram, electrical diagram, elementary diagram, electronic schematic) is a graphical representation of an electrical circuit. A pictorial circuit diagram uses simple images of components, while a schematic diagram shows the components and interconnections of the circuit using standardized symbolic representations.

  5. Remote radio head - Wikipedia

    en.wikipedia.org/wiki/Remote_Radio_Head

    A remote radio head (RRH), also called a remote radio unit (RRU) in wireless networks, is a remote radio transceiver that connects to an operator radio control panel via electrical or wireless interface. When used to describe aircraft radio cockpit radio systems, the control panel is often called the radio head.

  6. File:Tuned radio frequency (TRF) receiver block diagram 2.svg

    en.wikipedia.org/wiki/File:Tuned_radio_frequency...

    English: Block diagram of a tuned radio frequency (TRF) receiver, a type of radio receiver circuit invented in 1916 by Ernst Alexanderson and widely used in the vacuum tube receivers of the 1920s.

  7. Wiring diagram - Wikipedia

    en.wikipedia.org/wiki/Wiring_diagram

    An automotive wiring diagram, showing useful information such as crimp connection locations and wire colors. These details may not be so easily found on a more schematic drawing. A wiring diagram is a simplified conventional pictorial representation of an electrical circuit. It shows the components of the circuit as simplified shapes, and the ...

  8. Max Grundig - Wikipedia

    en.wikipedia.org/wiki/Max_Grundig

    In 1930, Grundig and a colleague opened a store selling radios under the name Fürth, Grundig & Wurzer (RVF), generating one million Reichsmark in sales by 1938. After World War II, business expanded with a successful range of consumer electronics. In 1972, the company became a corporation and was sold to Philips in 1984.

  9. Radio control - Wikipedia

    en.wikipedia.org/wiki/Radio_control

    Radio control (often abbreviated to RC) is the use of control signals transmitted by radio to remotely operate a device. Examples of simple radio control systems are garage door openers and keyless entry systems for vehicles, in which a small handheld radio transmitter unlocks or opens doors.