Rijeka Radio :

 

this is a very nice sounding voice mirror from the historical collection of Hajo Russow (1968)
these next two recordings come from the collection of Willi Passmann, voice mirrors in male...
...and in female versions from the shortwave radiotelephone ship service (both late 1970's)

 

here is a rather simple looking QSL letter - but it works! (Martin Foltz, 1975)

 

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Callsigns:
YUZ

 

Frequencies Voice:
1656
2182
2191
2574
2585
2615
2685
2771
4378
4405
4411
4429
4435
6501
6504
6510
6513
8710
8716
8746
8749
8760
8782
8806
13146
13155
13161
13191
17272
17293
17320
17395
17407
19782
19788
19794
19797
22603
22705
22711
22810
22843

 

Frequencies Morse Telegraphy:
439.5
500
525
4304
4331
4346
6421.5
8445
8514
8700
12780.5
12907.5
16942.8
17045.6
17175.2
22443
22563.5