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  2. JJ Electronic - Wikipedia

    en.wikipedia.org/wiki/JJ_Electronic

    JJ Electronic was founded in 1993 by Jan Jurco, using the old Tesla machinery for the manufacture of vacuum tubes. Eventually, JJ Electronic started to produce its own line of vacuum tubes and electrolytic capacitors, mainly targeted at high-end audiophile and guitar amplifier applications.

  3. Motorboating (electronics) - Wikipedia

    en.wikipedia.org/wiki/Motorboating_(electronics)

    Low frequency oscillations like motorboating indicate that some device or circuit with a large time constant is involved, such as the interstage coupling capacitors [6] or transformers, or the filter capacitors and supply transformer winding. [6] In vacuum tube circuits, a common cause is feedback through the plate power supply circuit.

  4. Audio crossover - Wikipedia

    en.wikipedia.org/wiki/Audio_crossover

    A passive 2-way crossover designed to operate at loudspeaker voltages.. Audio crossovers are a type of electronic filter circuitry that splits an audio signal into two or more frequency ranges, so that the signals can be sent to loudspeaker drivers that are designed to operate within different frequency ranges.

  5. List of capacitor manufacturers - Wikipedia

    en.wikipedia.org/wiki/List_of_capacitor...

    A capacitor is a passive device on a circuit board that stores electrical energy in an electric field by virtue of accumulating electric charges on two close surfaces insulated from each other. This is a list of known capacitor manufacturers, their headquarters country of origin, and year founded. The oldest capacitor companies were founded ...

  6. Applications of capacitors - Wikipedia

    en.wikipedia.org/wiki/Applications_of_capacitors

    The capacitors act as a local reserve for the DC power source, and bypass AC currents from the power supply. This is used in car audio applications, when a stiffening capacitor compensates for the inductance and resistance of the leads to the lead-acid car battery.

  7. Valve audio amplifier - Wikipedia

    en.wikipedia.org/wiki/Valve_audio_amplifier

    A valve audio amplifier or vacuum tube audio amplifier is a valve amplifier used for sound reinforcement, sound recording and reproduction. Until the invention of solid state devices such as the transistor , all electronic amplification was produced by valve (tube) amplifiers.