Tallinn Radio :

 

no recordings available from recent times - this one is from 1987, when they were well known as 'UAH' (see also here)

 

this nice QSL card was received by Reinhard Klein-Arendt in 2003
very colourful and informative verification, sent to Fritz Lehmkühler in 2013
Mauro Giroletti received an interesting eMail, besides the colorful card (2016)

 

here is their website

 

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Callsigns:
ESA
U
UAH

 

Frequencies Voice:
1650
2182
2610
3310
4420
8761
13101
17359
22786

 

Frequencies Morse Telegraphy:
445.5
450
500
2359
4220
4285
6281
6405
6485
8476
8570
8650
8710.5
12723
12755
17077
17107
19715.5

 

Frequencies Radioteletype:
518
2795
4210.5
4212
6318
8420
8422
8423.5
12593
12594.5
12600.5
12723
16826
16829.5

 

Systems used:
SITOR