Pozuelo del Rey Radio :

this station (telephony only) was unified with the telegraph only coastal station Aranjuez Radio and renamed to Madrid Radio

 

one of the last stations still transmitting in AM (rb, 1971)
voice mirror in USB from 1974 (Michael Marten)

 

a detailed verification letter from 1973 (rb)
here a nice QSL with letter and postcard, showing the famous 'Telefonica' building in Madrid (Willi Passmann, 1978)

 

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Callsigns:
EHY

 

Frequencies Voice:
8770.4
17660
22596