6GV8
The 6GV8 (European: ECL85) (P/N 154-0468-00) is a triode-pentode combo vacuum tube with a B9A (Noval) miniature 9-pin base, designed as an oscillator-amplifier for deflection of 110° TV CRTs.
It is used in the 526 and 529.
The 18GV8 / PCL85 is a version for 300 mA series heating.