S2030N G9002 RENS1818 used tube
    Screen-grid Tetrode
   close to Telefunken RENS1818
made by TUNGSRAM in Hungary in 1930's
The tube is used, tested with the great 100% result:
Ia = 3mA
where 100% for the new tube is 3mA
   the tube is in a great electrical shape.
the tube has Europe 5-Pin (O5A, B5) base, top contact screw type
you will get the tube you can see at the pictures
I always send the tubes by priority registered mail with tracking number within hours after receiving payment