this CQ call was certainly not meant for the public... (rb, 1974)
this nice QSL from the files of Lars Lundström seems to
be a very rare one (1974)
------------------------------------------------------------
Callsigns:
FSB **
Frequencies Morse Telegraphy:
5779
7446
7832
10390
12224.5
14817.5
15684
15738
19360
19405
21807.5
24110
Frequencies Radioteletype:
2840
3593
3714
3717
4632.5
4837.5
5104
5208
5305.5
6792
6905
7401
7428
7532
8038
8045
8083
8097.5
9200
10224.5
10295
10390
10416
11538
12224.5
13520
13820
14817.5
15502.5
15592
15684
16090
18087
18190
19130
19360
19405
24070
Systems used:
50 Bd
SITOR
TWINPLEX