Dean solves second interval signal mystery
by Thomas from The SWLing Post on (#50ERN)
In response to our second mystery interval signal challenge, SWLing Post contributor, Dean Bianco replies: Mystery solved! This is the "interval signal" (more accurately, a placeholder with a musical station identifier) for the Compania Telefonica Nacional de Espana (CTNW) from Madrid, Spain. They were a point-to-point HF radiotelephone terminal that provided overseas telephone and telegraph ["]