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25V Capacitor Bank for OCL Amplifier

Rangkaian 25V Capacitor Bank
The circuit diagram below shows how the +25V DC and -25V DC are obtained. In order to provide power supply for stereo amplifiers, a power transformer rating of 80VA with 240V/36V centre tapped secondary winding is used. The secondary output of the transformer is rectified by using four 1N5401 diodes together with 4 electrolytic capacitors to smoothen the ripple voltage. A fuse and a varistor are connected at the primary input to protect the circuit against power surge. Here you can see the circuit’sdiagram diagram

25V <strong><a href=Capacitor Bank for OCL Amplifier"> Skeme Rangkaian 25V Capacitor Bank for OCL Amplifier

Although shown with 4, 700uF filter capacitors, larger ones may be used. Anything beyond 10, 000uF is too expensive, and will not improve performance to any worthwhile degree. Probably the best is to use two 4, 700uF caps per side (four in all). This will actually work better than a single 10, 000uF device, and will be cheaper as well.
It is essential that fuses are used for the power supply. While they will not stop the amp from failing (no fuse ever does), they will prevent catastrophic damage that would result from not protecting the circuit from over-current conditions.

Source: Koleksi Skema Rangkaian|Artikel Elektronika

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  • Avatar Scooba Steve High pass filter capacitor. Do I need to have the right voltage capacitor?
    Sep 22, 2007 by Scooba Steve | Posted in Car Audio

    Im repairing some speakers and the high pass filter for the tweeter has blown. It is a simple first order high pass filter so it just consists of a simple capacitor. The old capacitor rating is 1.8uf and 50volts. Im go …only find information about the farad value and their relation to the frequency you want the high pass filter to start working at. Nothing about the voltage rating of the capacitor and its effect on the high pass filter.

    • It depends on the signal you are applying to the cap. A lot of circuits are over-engineered but if you are not sure about the signal at all times including power-up and power-down, then stick with the voltage rating on th …acitor, only its survival in the circuit. Put too much voltage on a capacitor and it will eventually arc internally and most likely change the capacitance of the device. This can happen if your amp overdrives the speaker.