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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: RC network(zobel) Radio Frequency speaker filter question?(rather long) posted by Keith Lockwood on May 9, 2005 at 12:23:41:
It's my understanding the a Zobel is used to smooth the impedance fluctions of a driver at different frequencies : Z varys with frequency. A driver/speaker ensemble is usually taken @ 1 K Hz. and varys at other frequencies. Zobels are most effective on Woofers & MR's and have little effect if any on tweeters What you need to eliminate RFI is a "snubber" that will act as a filter to shunt RFI to ground. A good driver snubber is a 0.01 cap in series with about a 7 ohm Carbon Comp R connected to Gd. from the "hot" terminal of the driver. The R acts to dissapate the RFI since CC R's are very "lossy". In your hi RFI environment I would use a snubber on each driver. use silver mica R's as they are non-inductive and have a very hi resonant frequency, which is why they are the favorites of radio Hams. Every cap has a resonant F at which it will electrically drop out of the circuit.Happy Listening !
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- Re: RC network(zobel) Radio Frequency speaker filter question?(rather long) - pkell44 05/9/0519:57:17 05/9/05 (0)
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