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"Wavescan" is a weekly program for long distance radio hobbyists produced by Dr. Adrian M. Peterson, Coordinator of International Relations for Adventist World Radio. AWR carries the program over many of its stations (including shortwave). Adrian Peterson is a highly regarded DXer and radio historian, and often includes features on radio history in his program. We are reproducing those features below, with Dr. Peterson's permission and assistance.

Wavescan, October 20, 2013

100 Years of Wireless and Radio in Bulgaria - 9: Shortwave QSL Cards

On this occasion here in Wavescan, we examine the multitude of QSL cards that Radio Sofia in Bulgaria has issued over the years. The Indianapolis Heritage Collection contains more than 130 QSL cards in various forms from the Bulgarian shortwave stations, with an additional pile of uncounted letters and greeting cards.

Radio Sofia was noted in earlier years as a prolific verifier of listener reception reports, though they did operate under their own distinct procedures that were a little different from what other major stations had implemented. In earlier days, Radio Sofia shortwave requested listeners to submit a sequence of reception reports within a stated period of time, and these reports would then be verified by a series of six QSL cards in a progressive sequence.

After six QSL cards had been sent to the listener, then a Diploma was available; and there were three progressive diplomas, Bronze, Silver & Gold. In order to obtain a Gold Diploma, at one stage it was necessary for the listener to send in a total of 63 reception reports within a period of somewhere around 70 weeks, a total time period of nearly 1-1/2 years.

However, Radio Sofia did acknowledge many reception reports with the regular processing of QSL cards that were not linked to the Diploma system. In addition, they also sent out New Year and Spring greeting cards, picture cards of Bulgaria, and letters of greeting that described various events and places of interest in their country.

The earliest QSL response from Bulgaria in the Indianapolis collection is a self prepared QSL card verifying the reception of station LZA on 14970 kHz on Sunday September 27, 1936. This card was addressed to a listener in Canada.

At the time, transmitter LZA was a low powered operation, emitting just 1-1/2 kW from a location near the railway station in Sofia. This Morse Code transmitter had been recently modified for voice transmissions, and it was in use for communication traffic as well as the broadcast of radio programming, usually on Sundays. The listener in Canada was tuned to shortwave LZA at the time when it was on the air with its regular Sunday programming, a relay from the local mediumwave station in Sofia.

In the era following the end of World War II, the regular QSL card issued by Radio Sofia was a stylized card depicting a map of Bulgaria with an artistic rendition of the popular Bulgarian Rose in a side panel. This card was printed in pink and a shade of gray.

Over an extended time period of around a quarter century, the main emphasis on the Bulgarian cards was shown with various forms of maps depicting the country's location in Eastern Europe. These cards, always in color, also presented a radio tower with circular radio signals radiating from it. At this stage, some of these QSL cards were oversized, a little larger than the regular postcard of that era.

The first of the multi-series of QSL cards associated with their diploma system was introduced in the late 1960s, and these depicted photographic scenes of tourist interest in Sofia in full color. A side panel presented the Radio Sofia motif, which at the time was a stylized block printed in black, with a radio tower and the radiating radio signals in a circular pattern.

A similar followup series of six cards showed additional tourist scenes throughout Bulgaria, and the side panel showed the same stylized motif, though the black identification block was smaller in size.

For another period of time extending to another quarter century, several more series of Radio Sofia shortwave QSL cards were prepared. Each of the cards in these series depicted Bulgarian tourist scenes and the side panel in two, or perhaps three different shades of brown over a period of time, presented an updated version of the stylized Radio Sofia motif as a cluster of off center transmission circles.

Beginning in the late 1990s, a new series of very modernistic art paintings was prepared, and again these were in full color. These cards are intended to depict traditional scenes in Bulgaria: the performance of modern music, modern depictions of ancient tribal art, and Radio Sofia itself.

Interestingly, all of the above mentioned QSL cards, printed by the multi-thousand, are presented in the English language. However, some of the same QSL card designs were also printed with the text in German, and some with the text in French.

Regional radio stations in Bulgaria have also issued their own QSLs, in addition to the capital city based international shortwave service from Radio Sofia itself. For example, QSL cards and sometimes letters have been issued from the regional shortwave service Radio Varna near the Black Sea coastal tourist area; likewise from the regional mediumwave station Radio Zagora in the north east of the country; and also from the Home Service shortwave station Radio Horizont with its own postal address in Sofia.

We might also add that Radio Moscow has issued a few QSL cards for the relay of its own programming on shortwave from the large shortwave stations in Bulgaria, though the actual transmitter location has not always been correctly identified on the card.

Then too, the Voice of America has issued its own QSL cards from their head office in Washington, DC for their shortwave relay service via Bulgaria. We hold just one card from VOA Bulgaria. This card shows a brilliant morning sunrise as seen through the curtain antennas at the VOA relay station in Greenville, North Carolina, and it verifies the reception of their relay via a 250 kW transmitter on 13680 kHz at Plovdiv in Bulgaria.

We plan to return to the radio scene in Bulgaria next month, when you will hear the interesting story of special radio programming presented for the benefit of shortwave listeners living in Bulgaria.