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  2. Alinco - Wikipedia

    en.wikipedia.org/wiki/Alinco

    Alinco ( Alinco Inc.) (TYO: 5933) is a Japanese manufacturer of radio and amplification equipment, and in the Japanese market, metal products, construction equipment, and exercise equipment. [ 1 ] Corporate affairs

  3. File:Alinco logo.svg - Wikipedia

    en.wikipedia.org/wiki/File:Alinco_logo.svg

    This file is free content in the United States but non-free or potentially non-free in its country of origin. Wikimedia Commons only accepts files that are public domain or freely licensed in both the country of origin and the United States.

  4. Crystal radio - Wikipedia

    en.wikipedia.org/wiki/Crystal_radio

    Block diagram of a crystal radio receiver Circuit diagram of a simple crystal radio. A crystal radio can be thought of as a radio receiver reduced to its essentials. [3] [39] It consists of at least these components: [22] [40] [41] An antenna in which electric currents are induced by electromagnetic radiation.

  5. Test card - Wikipedia

    en.wikipedia.org/wiki/Test_card

    Test cards typically contain a set of patterns to enable television cameras and receivers to be adjusted to show the picture correctly (see SMPTE color bars).Most modern test cards include a set of calibrated color bars which will produce a characteristic pattern of "dot landings" on a vectorscope, allowing chroma and tint to be precisely adjusted between generations of videotape or network feeds.

  6. Fisher Electronics - Wikipedia

    en.wikipedia.org/wiki/Fisher_Electronics

    Fisher tube equipment is considered quite collectible today. Fisher's first receiver was the model 500, a mono AM/FM receiver using two EL37 output tubes. It had a brass-plated face panel and an optional mahogany or "blonde" wooden case. This early mono receiver should not be confused with the later stereo tube receiver models, the 500B and ...

  7. Bar (music) - Wikipedia

    en.wikipedia.org/wiki/Bar_(music)

    The first metrically complete bar within a piece of music is called "bar 1" or "m. 1". When the piece begins with an anacrusis (an incomplete bar at the beginning of a piece of music), "bar 1" or "m. 1" is the following bar. Bars contained within first or second endings are numbered consecutively.

  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. Direct-conversion receiver - Wikipedia

    en.wikipedia.org/wiki/Direct-conversion_receiver

    A direct-conversion receiver (DCR), also known as a homodyne, synchrodyne, zero intermediate frequency or zero-IF receiver, is a radio receiver design that demodulates the incoming radio signal using synchronous detection driven by a local oscillator whose frequency is identical to, or very close to the carrier frequency of the intended signal.