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  2. List of Yamaha Corporation products - Wikipedia

    en.wikipedia.org/wiki/List_of_Yamaha_Corporation...

    PSR-A2000 (2012, Oriental model and black version of Yamaha PSR S710. And the first A series whose Pitch Band and Modulation uses a Joystick) PSR-A3000 (2016, Oriental version based on Yamaha PSR-S770 and first A Series to have multiple colours in the board) PSR-A5000 (2021, Oriental

  3. Wiring diagram - Wikipedia

    en.wikipedia.org/wiki/Wiring_diagram

    A wiring diagram for parts of an electric guitar, showing semi-pictorial representation of devices arranged in roughly the same locations they would have in the guitar. 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.

  4. 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.

  5. Kill switch - Wikipedia

    en.wikipedia.org/wiki/Kill_switch

    An emergency switch in Japan. On railways, [1] an emergency stop is a full application of the brakes in order to bring a train to a stop as quickly as possible. [2] This occurs either by a manual emergency stop activation, such as a button being pushed on the train to start the emergency stop, or on some trains automatically, when the train has passed a red signal or the driver has failed to ...

  6. Crystal radio - Wikipedia

    en.wikipedia.org/wiki/Crystal_radio

    A crystal radio receiver, also called a crystal set, is a simple radio receiver, popular in the early days of radio. It uses only the power of the received radio signal to produce sound, needing no external power. It is named for its most important component, a crystal detector, originally made from a piece of crystalline mineral such as galena ...

  7. Yamaha Corporation - Wikipedia

    en.wikipedia.org/wiki/Yamaha_Corporation

    In the late 1990s, Yamaha released a series of portable battery operated keyboards under the PSS and the PSR range of keyboards. The Yamaha PSS-14 and PSS-15 keyboards were upgrades to the Yamaha PSS-7 with short demo songs, short selectable phrases, and sound effects. [13] In 2002, Yamaha closed its archery product business that was started in ...

  8. Tuned radio frequency receiver - Wikipedia

    en.wikipedia.org/wiki/Tuned_radio_frequency_receiver

    A tuned radio frequency receiver (or TRF receiver) is a type of radio receiver that is composed of one or more tuned radio frequency (RF) amplifier stages followed by a detector (demodulator) circuit to extract the audio signal and usually an audio frequency amplifier. This type of receiver was popular in the 1920s.

  9. List of vacuum tubes - Wikipedia

    en.wikipedia.org/wiki/List_of_vacuum_tubes

    E – max. 200mA; The following digit is a sequentially assigned number. An optional, following letter indicates the base: E – Edison screw lamp base; K – Octal base; P – Side-contact 8-pin base; Examples: 75B1 – Voltage reference tube, miniature 7-pin base; 75C1 – Voltage reference tube, miniature 7-pin base