OG-3 Dekatron Max. counting speed kHz 20 The OG-3 is a single-pulse dekatron with 40 cathodes and an unusual extra output cathode. 20 kHz counting speed, helium-hydrogen fill, octal base. Light color - PURPLE. Counting direction bidirectional Operation single pulse Sort counting tube Base K8A Socket K8A Zero position Pin 1 Counting steps 10 Number of guides 3 Gas filling Argon Tube diameter max. mm 33 Tube height max. mm 76 Max. counting speed kHz 20 Supply volt. min. V 420 Supply volt. typ. V 450 Maintaining voltage min. V 170 Maintaining voltage typ. V 190 Maintaining voltage max. V 210 Anode/cath. current min. μA 600 Anode/cath. current typ. μA 700 Anode/cath. current max. μA 800 Power supply power min. mW 315 Guide bias volt. min. V 40 Guide bias typ pulse op. V 40 Guide bias volt. max. V 50 Guide signal voltage pulse Vp 110-140 (125) Guide signal pulse duration min μs 17-22 Reset pulse duration min. μs 2-5 Pinout: PIN 01 G3 PIN 02 K1-9 PIN 03 G2 PIN 04 NC PIN 05 G1 PIN 06 A PIN 07 Guide3 (K0) PIN 08 K0