Re: Audio Filters

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From: ZOOM (kandrparker@sympatico.ca)
Date: Thu Jan 10 2002 - 10:19:21 CST


That is good to know. I didn't realize the DaTong was that effective.

Robert
VE3RPF

----- Original Message -----
From: "James R. Duffey" <jamesd1@flash.net>
To: "Low Power Amateur Radio Discussion" <qrp-l@Lehigh.EDU>
Sent: Wednesday, January 09, 2002 11:34 PM
Subject: Re: Audio Filters

> Zoom - Actually the DaTong is a very good analog filter that can hold its
> own against the new DSPs. It is a 5th order elliptic filter. The cut off
> slopes are steep, but not as steep as the DSPs. The stop band attentuation
> can be greater than the DSPs, at least at the notch frequencies.
>
> The DaTong has an automatic notch filter. That is an analog automatic
notch
> filter. It appears to the ear as fast as the best DSP's notch filter. It
> only handles one carrier, but it still is good competition to the DSP.
>
> Don't sell the old analog technology short. In some cases, like the DaTong
> it is competitive to the DSPs. - Duffey
>
>
> --
> James R. Duffey KK6MC/5
> Cedar Crest, NM DM65
>
>


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