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Date Posted: 22:26:42 04/22/07 Sun
Author: Randy Seden (Quitters never prosper)
Subject: 500 hz filter-Jim
In reply to: jim straight 's message, "Re: Gold Scanner Pro Manual" on 00:21:31 04/17/07 Tue

Jim,

Maybe I could be of assistance here. First though, how do you know that the tone you want to notch out is 500hz? Willy's right in that all's you need is a series L/C with a little impendance matching on both ends and you got one fine filter. For that matter, once you've raised the impedance to go into the filter you could put a couple Germanium diodes back to back for the limiter all in a cute litte package that plugs into the headphone jack.

Randy

P.S. I've just ordered a pair of speakers that have a resonant frequency of 390hz which is dead on for my MXT. Do you know the frequency of interest for one of your favorite detectors as I had you in mind when I bought them. I haven't given up on this yet!

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