[Elecraft] Roofing Filters

[Dave Van Wallaghen]

Thanks Ron, that was a good read and reiterated what you and Lyle stated
here. I read that before, but I think now that I've been playing around with
#338, it is just sinking in now.

Thanks again for the help.

73,
Dave W8FGU

> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net [mailto:elecraft-
> bounces at mailman.qth.net] On Behalf Of Ron D'Eau Claire
> Sent: Wednesday, February 20, 2008 7:35 PM
> To: elecraft at mailman.qth.net
> Subject: RE: [Elecraft] Roofing Filters
> 
> I see that Lyle (Mr. DSP) stepped in with the answer I couldn't have given
> you anyway <G>. That's the beauty of this reflector: lots of expertise and
> resources. I seldom "answer" a question without learning something myself!
> 
> Someone else dropped me a note reminding me that Wayne discusses roofing
> filters on the Elecraft web site and, in particular how he addressed the
> design issues of employing them in the K3. That FB write up is here:
> 
> http://elecraft.com/K3/Roofing_Filters.htm
> 
> Ron AC7AC
> 
> 
> 
> -----Original Message-----
> From: Dave Van Wallaghen [mailto:w8fgu at comcast.net]
> Sent: Wednesday, February 20, 2008 2:21 PM
> To: 'Ron D'Eau Claire'; elecraft at mailman.qth.net
> Subject: RE: [Elecraft] Roofing Filters
> 
> 
> First, thank you Ron for putting that in a very comprehensive manner that
> even I could understand ;-) As usual, you've turned on the "light bulb".
> 
> Now, when I purchased my K3 and debated on my purchase of the roofing
> filters, I spoke with a few hams who said that the roofing filters were
> primarily for blocking out close in and powerful signals and that if I
> didn't have that problem where I live, that the standard DSP filter with
> the
> standard 2.7khz filter would probably suffice. And that is what I did.
> 
> But I wonder (always dangerous), if operating on some of the noisier
> bands,
> would there be a benefit to using a narrower filter to cut down on the
> amount of energy hitting the DSP in order to help with digging out weak
> signals? Or is that not a consideration with this particular
> implementation
> of DSP in the K3?
> 
> As is, it has been fun playing around with digging out weak signals and
> enhancing them. I need to get a better antenna to rig switching setup so I
> can make a/b comparisons with my K2.
> 
> Thanks in advance,
> Dave W8FGU
> 
> >
> 
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