Re: Filters 7 IF Selection

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Subject: Re: Filters 7 IF Selection
From: KD5NWA (KD5NWA@cbayona.com)
Date: Thu Feb 26 2004 - 23:25:46 EST

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In reply to: Rich Johnson: "Filters 7 IF Selection"
Reply: KD5NWA: "Re: Filters 7 IF Selection"

That is a Wide FM IF frequency, the commonly available filers and IF 
transformers are extremely wide, wider than 100 KHz, the second harmonic is 
in the 15 meter band (21 MHz) which is not a good thing..

At 10:15 PM 2/26/2004, Rich Johnson wrote:
>I notice that 10.7MHz filter are available from digikey and maybe not narrow
>but maybe good roofing filters.  Then i'm thinking why is not 10.7 MHz
>popular for armature I/F systems?
>
>Is it because of he 15 m band being close?
>
>
>cheers,
>rich

Cecil
KD5NWA

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