Author: Alan, 5B4AHJ

The Radio Society of Great Britain, aka RSGB, was founded in 1913. 1988 was the 75th anniversary of the founding of the RSGB. Throughout 1988, many special events stations used the GB75 prefix from all parts of the United Kingdom, Isle of Man and the Channel Islands. These special event stations replaced the conventional special event GB1-8 prefixes with GB75. Thus, these special event stations celebrated two events:

- The 75th anniversary of the RSGB, signified by the GB75 prefix

- A local event, signified by the suffix

GB75STT was QRV for the Scottish Televison Telethon
GB75FI was QRV from Flatholm Island
and so on.

RSGB DX News Sheet #1329 reports that GV75/HA8BI was a special callsign issued to HA8BI, a visitor to the RSGB 75th Anniversary clebrations. GB75/HA8BI was QRV from the station of G4TZI, near Luton, England.
RSGB DX News Sheet #1331 reports that TV75RS (not a typo, but France) celebrated the 75th anniversary of the RSGB!