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Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ.

Rest of the answer, Jim

So, now that you know the characteristic impedance of your cables (hopefully), all you need to do is to match the resistor value to that value - in my case it was 71ohms. Then calculate the amount of capacitance you need together with that resistance to achieve the -3dB corner frequency you would like, using the equation:

f=1/(6.28*R*C) , where resistance is in ohms and capacitance is in Farads

In my case, I wanted to get an f = about 500kHz, so I used 4.2nF of capacitance.




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  • Rest of the answer, Jim - Maxamillion 05/13/1004:28:12 05/13/10 (0)

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