IOA Guayaquil :
listen to this recording from the collection of Willi Passmann
friendly verification letter (Frank Schüttig, 1978)
another nice letter from 1978 (Willi Passmann)
nice and detailed QSL-card with letter, from 1982 (rb)
a rather recent QSL from the colllection of Fabricio Andrade Silva (2011)
------------------------------------------------------------
Callsigns:
HCHD2
HD2IOA
Frequencies Voice:
3810
5000
7600