Telefunken triode hexode frequency changer valve, type ECH11, Y8A base, metal envelope detached, with valve holder, (RMW/Y189 - McVitie Weston number), made by Telefunken, 1946.
Telefunken triode hexode frequency changer valve, type ECH11, Y8A base, metal envelope detached, with valve holder, (RMW/Y189 - McVitie Weston number), made by Telefunken, 1946.