Michael Marten made this recording in 1974 of a CQ call of TUA5
in telegraphy
no pictures of QSLs or other info available
------------------------------------------------------------
Callsigns:
TUA *
Frequencies Voice:
2182
2586
4366
4411
4413.2
6504
6507
6512.6
8734
8782
8784
13089
13110
13113.2
17335.2
17341
22670.4
22768
Frequencies Morse Telegraphy:
487
500
4343
8464
13061
16947.8