In South America, three non-Spanish speaking countries — Guyana, French Guiana, and Surinam — were key DX targets for listeners around the world. A history of broadcasting in Guyana can be found here. DX’ers who are still surviving and whose listening stretched back into the 1950’s and 1960s are lucky to have received the classic older ZFY / Radio Demerara QSL cards, whereas later the main station GBS sent out only letter verifications. Guyana was still on shortwave as of 2015 as reported here.
In 1971, Christmas Eve, at the very beginning of my listening career, I used a 1940’s era T-133 Pilot Radio to hear Guyana on 3,290 khz. The station listed a power of 10 kilowatts. One of these two recordings has the transition to Christmas day as an announcer said: “On Action Radio, the proclamation of Guyana, the time is midnight. It is not Christmas morning 1971. On behalf of the management and staff of GBS, this is Ron Standish wishing you all a very Merry Christmas. . .” The broadcast then switched to midnight mass in the cathedral in Georgetown, the capital. A longer recording is also included here. Note the heavy interference on 3,290 khz from a utility station that made hearing Guyana so difficult for years.