Nibble 34 - Test Card F on August 30, 2022 1960s 20th century BBC +13 blackboard broadcasting Carole Hersee clown colour culture engineering George Hersee graphic design media technology television test card Test Card F test pattern TV UK 1960s 20th century BBC blackboard broadcasting Carole Hersee clown colour culture engineering George Hersee graphic design media technology television test card Test Card F test pattern TV UK
Crumb - The BBC "Pips" on August 20, 2022 1920s 20th century audio BBC +8 broadcasting crumb electronics Greenwich Time Signal media radio sound technology time timekeeping UK 1920s 20th century audio BBC broadcasting crumb electronics Greenwich Time Signal media radio sound technology time timekeeping UK
