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Re: Reasonable call prefilter


 

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The discussion below assumes one is connecting to a node running AR Cluster software written by the late AB5K.? Users need to send filter commands that, in my opinion, are complicated in order to customize the spots they receive, either to eliminate bad spots or restrict the spots by band, mode, origin, etc.

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CC Clusters, which use node software by Lee VE7CC, have built-in dupe filters and validation checks, so users don’t have to send a command to do that.

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The two most popular CC Cluster nodes in North America are VE7CC and AE5E.? The latter is at the HQ of Digi-Key in northern MN, so it has commercial internet service, which makes it more reliable that nodes using regular, residential internet service.? Another of interest is N2WQ-1, which is hosted by AWS, Amazon Web Services, so it’s reliable and fast.

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If you do want to filter at the node, which I especially recommend for contesting with a logging program, such as N1MM, you can use a free program CC-User, written by VE7CC, to set up different filters for contests and regular DXing.? Info at:

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Jim N7US

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From: [email protected] <[email protected]> On Behalf Of ve3ki via groups.io
Sent: Monday, February 3, 2025 5:22 PM
To: [email protected]
Subject: Re: [DXLab] Reasonable call prefilter

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I posted this on the N1MM Logger+ group just over a month ago:

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See <>, near the top of page 5.

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Looking at those definitions: Skimvalid looks for multiple spots with the same callsign. Skimbusted looks for similar (e.g. "off-by-one") callsigns that are already marked as valid. A busted spot could still pass as Skimvalid if enough skimmers bust the call the same way, but if the correct call has already been spotted there, adding Not Skimbusted to the filter may help prevent the busted spot from showing up.

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73,

Rich VE3KI

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On Mon, Feb 3, 2025 at 05:04 PM, Jamie WW3S wrote:

Whats the difference between, if any, between NOT SKIMBUSTED and SKIMVALID ? My skimmer filters use SKIMVALID and other than occasionally getting a T in front of some calls, they seem pretty reliable …..

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On Feb 3, 2025, at 7:41?AM, John K3TN via groups.io <jpescatore@...> wrote:

For all AR clusters you can enter a filter command that takes advantage of spot quality filter: SET DX FILTER NOT SKIMBUSTED

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That does a great job of eliminating bad RBN/skimmer spots, based on work by CT1BOH. Not perfect, but really big step forward.

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73 John K3TN

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