This part is a kind of semiconductor called EL36.

Function of this product has Output Pentode.

Manufacturers : Philips

Image and pinout :

Some of the text within the PDF file :

page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 EL36 sheet 1 2 3 A B C D E F G H I J K L M N O P date 1958.09.09 1958.09.09 1958.09.09 1958.09.09 1958.09.09 1958.09.09 1958.09.09 1958.09.09 1958.09.09 1958.09.09 1958.09.09 1958.09.09 1958.09.09 1958.09.09 1958.09.09 1958.09.09 1958.09.09 1958.09.09 1958.09.09 20 21 22, 23 Q R FP 1958.09.09 1958.09.09 1999.07.04 [ ... ]

EL36 PDF Datasheet Download