1 F 33 (DF 91)
pentode
Heater : direct; Uf = 1.4V; If = 0.05A
Maximum Ratings : Ua = 90V;Pa = 0.5W;Ug2 = 67.5V;Pg2 = 0.2W
Ik = 5.5mA
Measured Data: Ua = 67.5V;Ug2 = 45V;Ug1 = 0V
Ia = 1.7mA;Ig2 = 0.7mA;S = 0.7mA/V
applications : pentode of the company tesla for regulated rf-stages in battery powered devices
 1  -f,g3      
 2  a      
 3  g2      
 4  -      
 5  -f,g3      
 6  g1      
 7  +f      
        

B7G pin connections