listen to their call from
2182 kHz, recorded in 1988 by Rudy van Dalen
received in 1974: a prepared post card (rb)
a detailed verification letter from the collection of Ary Boender
(1983)
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Callsigns:
FFU
Frequencies Voice:
1635
1671
1673
1710
1862
1876
2182
2691
2723
2726
3354
3357
3719
3722
Frequencies Morse Telegraphy:
416
433.5
436.5
443.5
500
512
517
520.5
Frequencies Radioteletype:
518
1611
1612
1619.5
1620.5
Systems used:
SITOR