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I need a filter capacitor for a Knight KG-250 integrated amp. It has six leads-six different capacitances provided-I need it to get rid of an awful hum. Do I stand a chance of finding one or shall I junk it? It is a sweet old unit, and cosmetically in fine shape.

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Would you be able to post the capacitance's and the voltage ratings?
If you are not able to find the one with the 6 leads, you can try to find them individually and that should work just fine.

Posted on Nov 30, 2008


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Not easy to explain. The capacitor is split, it has two values, or like two capacitors connected internally with a center tap between them. Two capacitance values, maybe 5uf and 20uf, the lower value for the fan motor and the higher for the compressor, with terminals C-common, F-fan, M-compressor.
Capacitor terminal C is the center tap and that takes 3 connections, line (power) - fan line common to capacitor, and Compressor line common to capacitor. Notice the fan and compressor have a power line not common to capacitor, just power line.
Capacitor terminal F has one wire connecting to Fan terminal C, fan may have three or four terminal writes, two for power with one power being common to capacitor connection and the other power alone, two power connection wire leads. Fan motor third line is capacitor, connects to the capacitor alone. Four wire configuration fan motor is not likely your needs. Omit or ask again for further explanation.
Compressor is similar to fan, only with a capacitance value higher than for tha fan motor. Two power leads, one straight power, the other power lead connects to the capacitor power. The third compressor lead connects alone to the capacitor.
The with is to draw a diagram and level the colors of each lead and terminal lavels too. The motors nameplate may indicate wire color code, the a-c nameplate wiring diagram may be present in the control wron wiring compartment, the goal is to find clues or to trace each wire and verify what they connect or do, take notes on your drawing.
Basically the motor has three terminals, L1 - L2 - C, or C- S-R (Common, Start,Run)

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A/C unit fan doesn't run.

Check the fan capacitor.
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My beaitiful Knight KG 250 amp has a loudly humming 6 lead filter cap. Can I ever find a replacement? This amp had a wonderful, rich tone. Thanks, Floydian

Try to search for "filter capacitor" at

I did a search and found some. Look for the value of your current filter caps and find capacitors with the same value.

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Your lights are dimming because your system is pulling too much current from your car. Your battery provides long-term sustained power, but your system wants to draw power faster than your alternator and battery can provide it. When the amp attempts to draw more amperage than the battery and alternator can produce, it creates a voltage differential in your system, which attempts to steal electricity from the rest of your system (like your lights). The most common solution for lights dimming is to add some level of adequate capacitance to your car. Capacitors store electricity and deliver it quickly to your amps as needed. Capacitors resist voltage changes by producing large amounts of amperage. This means that the capacitor(s) will provide the electrical bursts that your amps want so that it doesn't have to steal it from your lights. You can start out with 1.0 Farad, if the problem doesn't go away, add another one, and so on until the problem is gone. You cannot have too much capacitance, it's just an electrical buffer for your audio system.

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Easy fix. Wipe the capacitance sensing metal stripes located right below the inside of the filter. Make sure the 2 metal stipes are very clean. This measures the capacitance of the clothes and constantly records differences till the clothes are dry.if **** is on these then you would have failure. Porvavor.

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