Half year or so, all tubes which that Thomas Mayer presented in this series had been quite old developments from the 1920ies to 1930ies. This time Thomas reveals more modern tube of the month, small high frequency triode, developed in the 1960ies by Telefunken – the EC8010.
Currently spoltighted EC8010 is the small sister of the EC8020 and was most likely developed first.
Link: here