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LF: Signals measured

To: "LF-Group" <[email protected]>
Subject: LF: Signals measured
From: "Dick Rollema" <[email protected]>
Date: Sun, 28 Jan 2001 16:01:07 +0100
Reply-to: [email protected]
Sender: <[email protected]>
To All from PA0SE
 
My plea for more normal CW activity on Saturday  and Sunday morning had success. There was a healthy flow of traffic.
Unfortunately later on Sunday morning reception was hampered by interference from some electrical appliance and only loud signals could be measured and then only with diminished accuracy because the interference widened the trace on the oscilloscope.
 
Time  Call sign   Field strength  Input to receiver  S-report 1)    Remark
 UTC                      µV/m                            dBm
 
                                            Saturday 27 January 2001
 
0811      DCF139             2065                       -32                            S9 + 41dB
 
0816      G3YXM                   13.8                    -75                            S8 + 4dB             2)
 
0834      Greek RTTY          13.8                    -75                            S8 + 4dB
 
0850      G3XDV                      5.5                    -83                           S7 + 2dB             3)
 
0908      G3BDQ                      5.5                    -83                           S7 + 2dB            3)
 
0928      G3OLB                      4.5                    -85                            S7
 
0935      DF0WD                     6.2                    -82                            S7 + 3dB
 
0945      GW4HXO                  1.7                    -93                            S5 + 4dB
 
1000      DJ9IE                        17.2                  -73                            S9 
 
1015      DCF139               1720                      -33                            S9 + 40dB                  
 
1017      Greek RTTY            12.4                   -76                            S8 + 3dB
 
1022      G6RO                          2.1                  -91                            S6
 
1023      G3XTZ                        7.9                   -80                            S7 + 5dB
 
1037      ON6ND                     33.0                   -68                            S9 + 5dB 
 
1234      G3YXM                     12.4                    -76                            S8 + 3dB           4)
 
                                                 Sunday 28 January 2001
 
0844      DJ9IE                        17.2                    -73                            S9
 
0848      DCF139                1720                       -33                            S9 + 40dB
 
0849      Greek RTTY               9.6                    -78                            S8 + 1dB
 
0852      HB9ASB                     1.9                    -92                            S5 + 1dB
 
1053      DJ5DI                           6.9                   -79                             S8
 
1056      DL3FDO                      3.0                   -88                             S6 + 3dB
 
1057      DF0WD                        6.9                   -81                             S7 + 4dB
 
Remarks:
 
1)  IARU Recommendation: S9 = -73dBm;  1 S-point = 6dB
 
2)  Aerial coil within its cage
 
3)  Working G4CNN; in the 35Hz bandwidth of my audiofilter I could just detect the presence of  John's signal but  it was too weak to be readable.
 
4)  Aerial coil outside its cage. The signal was 1dB weaker than at 0816 but the same applies to DCF139 and the Greek RTTY so Dave's signal must have been equally strong with the coil inside and outside the cage.   Dave can also check that himself by listening to a strong steady signal, for instance from DCF139 during daytime.  
 
73, Dick, PA0SE
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