InternationalGlory Days of Shortwave: Interval Signals and QSLs October 20, 2018 Author: Radio Heritage Foundation Glory Days of Shortwave – Interval Signals and QSLsHere’s a collection of signature tunes / interval signal set to QSLs and other pictures published by SWLDXBulgaria on YouTube. Great stuff!(Visited 74 times, 1 visits today)Share this to your favourite social mediaRelated newsNow The Philips Film March 8, 2018 Lure of the Trail – Programme 7 – Christchurch Entrance to Library of American Broadcasting, University of Maryland in College Park, MD. © Martin Hadlow June 25, 2007 Keeping the past for the future – Library of American BroadcastingComments: 0 Cancel ReplyYour email address will not be published. Required fields are marked with * Save my name, email, and website in this browser for the next time I comment.