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  2. Constant-voltage speaker system - Wikipedia

    en.wikipedia.org/wiki/Constant-voltage_speaker...

    Special-purpose transformers capable of handling 1250 watts down as low as 50 Hz are available. [4] One problem with high power, high current transformers is that fewer can be used on a single constant-voltage line. Larger diameter speaker wire is recommended. Larger transformers needed for high power handling have reduced high-frequency response.

  3. Talk:Constant-voltage speaker system - Wikipedia

    en.wikipedia.org/wiki/Talk:Constant-voltage...

    To 129.55.27.4, who changed the transformer information: Transformers do not act as lowpass filters. They block DC voltages. 70V transformers result in a lack of low frequency information. High frequency information is not affected. Revision undone. 74.92.147.125 19:17, 26 March 2008 (UTC) Actually, you're both right.

  4. 2N3055 - Wikipedia

    en.wikipedia.org/wiki/2N3055

    70V CER (RBE = 100 Ohms) 15 A 90 W 20–70 at 4 A 2.5 MHz min TIP3055 Texas Instr, Philips, Central Semiconductor Corp: NPN TO-218AA/SOT-93 70 V CER (RBE <= 100 Ohms) 15 A 90 W 20–70 at 4 A 3.0 MHz min TIP3055 Motorola NPN 340D-02 plastic 60V CEO 70V CER (RBE = 100 Ohms) 15 A 90 W 20–70 at 4 A 2.5 MHz min

  5. Telephone hybrid - Wikipedia

    en.wikipedia.org/wiki/Telephone_hybrid

    Telephone hybrid transformer at the interface of the four-wire long-distance trunk and the two-wire local loop. Z B is the balance termination. NBOC is the network build-out capacitor, which is set to the average shunt capacitance through the telephone central office switch. Red arrows show relative current flow.

  6. Electrical element - Wikipedia

    en.wikipedia.org/wiki/Electrical_element

    a transformer with three separate windings has six terminals and could be idealized as a three-port element; the ends of each winding are connected to a pair of terminals representing a port. Elements can also be divided into active and passive: Passive elements – These elements do not have a source of energy; examples are diodes, resistances,

  7. Voltage transformer - Wikipedia

    en.wikipedia.org/wiki/Voltage_transformer

    A capacitor voltage transformer (CVT), is a transformer used in power systems to step down extra high voltage signals and provide a low voltage signal to the actual VT (voltage transformer) used for operating metering/protective relays due to a lower cost than an electromagnetic PT. The circuit diagram for a simple capacitor voltage transformer

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