I missed it, what filter? link?
Rick, N6PE
===============================================================
Remember, E = M * C^2 was not the entire equation.
--- On Sat, 3/7/09, rfi-request@contesting.com <rfi-request@contesting.com>
wrote:
> From: rfi-request@contesting.com <rfi-request@contesting.com>
> Subject: RFI Digest, Vol 75, Issue 3
> To: rfi@contesting.com
> Date: Saturday, March 7, 2009, 12:00 PM
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> Today's Topics:
>
> 1. DSL Filter Update (Roger Parsons)
> 2. Re: DSL Filter Update (Jim Brown)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sat, 7 Mar 2009 11:29:05 -0800 (PST)
> From: Roger Parsons <ve3zi@yahoo.com>
> Subject: [RFI] DSL Filter Update
> To: rfi@contesting.com
> Message-ID:
> <930400.19730.qm@web110510.mail.gq1.yahoo.com>
> Content-Type: text/plain; charset=utf-8
>
>
> Just to advise the group that a couple of other stations
> have had success with this filter. Nick, VE3FJ, also checked
> out its frequency response with the following results:
>
> 1.85MHz -26dB
> 3.65MHz -46dB
> 7.24MHz -68dB
> 14.13MHz -60dB
> 21.0MHz -56dB
> 28.5MHz -54dB
>
> Of course in theory the stop band attenuation should
> continue to increase with frequency, but in practice there
> will be strays across the filter that will cause a
> performance drop at higher frequencies.
>
> 73 Roger
> VE3ZI
>
>
>
>
>
>
> ------------------------------
>
> Message: 2
> Date: Sat, 07 Mar 2009 11:42:04 -0800
> From: "Jim Brown"
> <jim@audiosystemsgroup.com>
> Subject: Re: [RFI] DSL Filter Update
> To: "rfi@contesting.com"
> <rfi@contesting.com>, "Roger Parsons"
> <ve3zi@yahoo.com>, "ve3zi@rac.ca"
> <ve3zi@rac.ca>
> Message-ID:
> <20090307194159.6804357D0A@gw1.nlenet.net>
> Content-Type: text/plain; charset="us-ascii"
>
> On Sat, 7 Mar 2009 11:29:05 -0800 (PST), Roger Parsons
> wrote:
>
>
> >Just to advise the group that a couple of other
> stations have had
> >success with this filter. Nick, VE3FJ, also checked out
> its
> >frequency response with the following results:
>
> >1.85MHz -26dB
> >3.65MHz -46dB
> >7.24MHz -68dB
> >14.13MHz -60dB
> >21.0MHz -56dB
> >28.5MHz -54dB
>
> >Of course in theory the stop band attenuation should
> continue to
> >increase with frequency, but in practice there will be
> strays
> >across the filter that will cause a performance drop at
> higher
> >frequencies.
>
> Roger,
>
> Exactly how was the response measured? What source and
> load
> impedances?
>
> 73,
>
> Jim K9YC
>
>
>
>
> ------------------------------
>
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> End of RFI Digest, Vol 75, Issue 3
> **********************************
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