GS35b  also GS7b 
Metal-ceramic transmitting power triode at frequencies up to 1000 MHz.
Oxide cathode indirectly heated.

Uh 12.6 V  @  2.95 A Input capacitance        21  +/-    3 pF Output capacitance    4.5  +/- 0.5 pF Feed-through                   <= 0.12 pF Ua      3 kV    ( peak 6 kV ) Ug1  -400 ... +120 V Ic       1.4 A Pa      1.5 kW   ( GS35a watercooled 2 kW ) Pg1    26 W total length        177 mm max. diameter   100.2 mm total weight       2.8 kg