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" <[EMAIL PROTECTED]> To: <dx4win@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, <[EMAIL PROTECTED]>, http://www.ad1c.us > _______________________________________________ > Dx4win mailing list > Dx4win@mailman.qth.net > http://mailman.qth.net/mailman/listinfo/dx4win > >
