4U1UN Log Information

Station logs · Archive status

4U1UN Log Information

Computerized records, historic log recovery, special event callsigns, and known gaps in the station archives.

231,855 QSOs

Recorded in the 4U1UN computer log as of November 17, 2025.

This is a dated archive total, not a live counter.

Log coverage and uploads

All QSOs contained in the 4U1UN computer logs have been uploaded to Logbook of the World (LoTW) and Club Log. New QSOs are uploaded regularly.

1980 onwardHistorical records included in the computer log
January 1993Beginning of regular computerized logging

The logs for 4U60UN and 4U64UN have been uploaded to LoTW. Logs for 4U70UN and 4U75UN have been uploaded to both LoTW and Club Log.

Recovery of historic logs

Thanks to Mohamed, KA2RTD, who recovered most of the handwritten logs from January 1985 to December 1992. Most of the old logs have been recovered, but some are still missing.

In 2019, Taizo, JA3AER, provided additional paper logs from 1980 to 1992.

The 4U1UN QSL Manager, HB9BOU, now holds these recovered logs.

Special callsigns and log availability

Availability varies by callsign. Some historic logs are not searchable through LoTW or Club Log.

4U0UN

old  paperlog, it's safe to send an e-mail first to HB9BOU asking if the QSO  is in the Log, no Computerlog, no LoTW, no Clublog search

4U40UN

1985, old  paperlog, it's safe to send an e-mail first to HB9BOU asking if the QSO  is in the Log, no Computerlog, no LoTW, no Clublog search

4U43UN

1988, old  paperlog, it's safe to send an e-mail first to HB9BOU asking if the QSO  is in the Log, no Computerlog, no LoTW, no Clublog search

4U45UN

1990, old  paperlog, it's safe to send an e-mail first to HB9BOU asking if the QSO  is in the Log, no Computerlog, no LoTW, no Clublog search

4U46UN

1992, old  paperlog, it's safe to send an e-mail first to HB9BOU asking if the QSO  is in the Log, no Computerlog, no LoTW, no Clublog search

4U47UN

1993, old compouterlog, it's safe to send an e-mail first to HB9BOU asking if the QSO is in the Log, no LoTW, no Clublog search

4U48UN

1994, old compouterlog, it's safe to send an e-mail first to HB9BOU asking if the QSO is in the Log, no LoTW, no Clublog search

4U50UN

1995, old computerlog, it's safe to send an e-mail first to HB9BOU asking if the QSO is in the Log, no LoTW, no Clublog search

4U50SPACE

2007, computerlog, but not on LoTW and Clublog

4U51UN

1996, old compouterlog, it's safe to send an e-mail first to HB9BOU asking if the QSO is in the Log, no LoTW, no Clublog search

4U60UN

2005, computerlog uploded to LoTW

4U64UN

2009, computerlog uploded to LoTW

4U70UN

2015, computerlog uploded to LoTW and Clublog direct + Bureau OQRS

4U75UN

2020, logs are uploaded to LoTW and Clublog on a regular basis

Known missing or incomplete logs

Can you help recover a missing log?
If you operated 4U1UN or a special callsign on any of the dates below and have a paper or electronic copy, please send it to QSL Manager HB9BOU.
Log date Log / event
08 oct 1992 4U47UN, only 1 QSO in the computer log, no paper log
24 oct 1992 4U47UN, no 20 m log for the CQWW
25 oct 1992 4U47UN, no 20 m log for the CQWW
03 jan 1993 4U1UN, only 1 confirmed QSO in the computer log, no paper log
10 jan 1993 4U1UN, only 1 confirmed QSO in the computer log, no paper log
13 jan 1993 4U1UN, only 1 confirmed QSO in the computer log, no paper log
20 jan 1993 4U1UN, no computer and no paper log for this date
23 mar 1993 4U1UN, no computer and no paper log for this date
26 mar 1993 4U1UN, only 2 confirmed QSO in the computer log, no paper log
27 mar 1993 4U1UN, no computer and no paper log for this date
28 mar 1993 4U1UN, only 5 confirmed QSO in the computer log, no paper log
30 mar 1993 4U1UN, only 1 confirmed QSO in the computer log, no paper log
22 apr 1993 4U1UN, no computer and no paper log for this date
30 apr 1993 4U1UN, only 4 confirmed QSO in the computer log, no paper log
30 mai 1993 4U0UN, only 2 confirmed QSO in the ccmputer log, no paper log
03 jun 1993 4U1UN, only 3 confirmed QSO in the computer log, no paper log
26 sep 1993 4U48UN, only 4 confirmed QSO in the computer log, no paper log
16 oct 1993 4U48UN, only 2 confirmed QSO in the computer log, no paper log
17 oct 1993 4U48UN, no computer and no paper log for this date
31 dec 1994 4U1UN, only 43 confirmed QSO in the computer log, no paper log
09 may 1995 4U50UN, only 24 confirmed QSO in the computer log, no paper log
22 sep 1995 4U50UN, only 10 confirmed QSO in the computer log, no paper log
2 dec 1995 4U50UN, only 2 confirmed QSO in the computer log, no paper log
30 jun 1996 4U1UN, only 4 confirmed QSO in the computer log, no paper log
20 jun 1997 4U1UN, only 1 confirmed QSO in the computer log, no paper log
17 jan 1998 4U1UN, no computer and no paper log for this date
03 oct 1998 4U1UN, only 18 confirmed QSO in the Computer log, no paper log
04 oct 1998 4U1UN, only 22 confirmed QSO (12m) in the Computer log, no paper log
17 oct 1998 4U1UN, only 28 confirmed QSO in the Computer log, no paper log
12 dec 1998 4U1UN, only 122 confirmed QSO in the Computer log, no paper log
13 dec 1998 4U1UN, only 2 confirmed QSO in the Computer log, no paper log
01 jan 1999 4U1UN, no computer and no paper log for this date
31 jul 2000 4U1UN, only 58 confirmed QSO (17m) in the Computer log, no paper log
15 jul 2001 4U1UN, only 57 confirmed QSO in the Computer log, no paper log
22 sept 2002 4U1UN,  no computer and no paper log for this date
16 oct 2002 4U1UN, only 10 confirmed QSO in the Computer log, no paper log
24 oct 2003 4U1UN, no PSK log
7 nov 2003 4U1UN, only 162 confirmed QSO in the Computer log, no paper log
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