[Dx4win] How much QSL manager data is useful?

[J ALBU]

Hi Jim

First at all many thanks for all the work you are developing  to keep the 
.CTY and Qsl Mgr...
In my opinion if I don't get a qsl in the past 5 years... I don't care with 
all those old add. and mgrs.
So the list could be shorter  ( shorter means accurate). Forget all the mgrs 
more than 5 to 10 years

Best regards and keep the excellent work Jim

73 de Jose CT1AOZ


----- Original Message ----- 
From: "Jim Reisert AD1C" <jjreisert at alum.mit.edu>
To: <dx4win at mailman.qth.net>
Sent: Monday, March 13, 2006 8:25 PM
Subject: [Dx4win] How much QSL manager data is useful?


> Hi Folks,
>
> Before I started working on the DX4WIN QSL manager database, there were 
> about
> 6,600 records.  Today it's getting close to 30,000 records.
>
> Some people sent me their DX4WIN.CTY files so I could merge the data into 
> the
> master file.  Some of them had over 100,000 QSL manager records.  I assume 
> they
> loaded one of the databases like ON6DP or OZ7C (I think there was an 
> Italian
> one floating around as well).  I threw these records out.  I tend not to 
> trust
> the BIG databases because they tend to have a high error rate (on the 
> order of
> 10%).
>
> I just did a little experiment with the ON6DP database:
>
> In my log of over 70,000 QSOs (going back to 1975), about 1/2 the DX 
> (non-USA)
> QSOs (not calls) do not have QSL managers listed.  If I remove the calls
> unlikely to have managers (i.e. fixed stations like G3, OH2, SM5, etc.), 
> this
> reduces to 7,760 QSOs with possible unknown managers.  I then assigned QSL
> managers from the ON6DP database, and found that 2,500 QSOs had managers 
> listed
> that are NOT listed in the DX4WIN QSL manager database.
>
> What does all this mean?  Based on my log alone, the database needs to 
> grow
> another 10% in order to assign missing QSL managers to my log.
>
> Where is all this leading:
>
> - Do you want a large QSL manager database in DX4WIN or a smaller one?
>
> - Is quality or quantity more important?  If you're unsure if the route is
> good, you could always look it up somewhere else?
>
> - Do you want only recent managers (i.e. going back to the last 10 years), 
> or
> something that goes back 20 or 30 years or even more?
>
> - Do you not even care, because you use the GOLIST or QRZ.COM or another 
> means
> for finding QSL manager information?
>
> Just some things to think about.
>
> 73 - Jim AD1C
>
>
> --
> Jim Reisert AD1C, 7 Charlemont Court, North Chelmsford, MA 01863
> USA +978-251-9933, <jjreisert at alum.mit.edu>, http://www.ad1c.us
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