{"type_number":"B6091","canonical_url":"https://tubeofile.com/tubes/B6091","manufacturer":"Burroughs","tube_type_key":"nixie_indicator","tube_type_display_name":"Nixie Indicator","base_name":"B13B","description":"Super size Nixie indicator tube with Long Life, Wide Angle viewing. Cold cathode gas-filled numeric display with 10 individually shaped cathodes (digits 0-9) and a common anode. Character size 0.8 inch, maximum viewing distance 38 feet. Manufactured by Burroughs Corporation, Electronic Components Division.","is_directly_heated":false,"completeness":"low","notes":["The B6091 is the original Burroughs type number; 8423 (NL-8423) is the EIA-registered designation for the same tube.","Nixie tubes are cold cathode devices — no heater is used. A neon-based gas filling provides the characteristic orange glow discharge.","Designed for desk top displays and bench test equipment (Super size category in Burroughs nomenclature).","The tube operates as a current device: sufficient B+ voltage and an appropriate series resistor are required to maintain cathode current within specified limits (1.5-4.0 mA).","Prebias voltage of 65 Vdc is the voltage applied between the 'on' cathode and the 'off' cathodes to prevent background haze from unwanted ionization.","Burroughs Catalog 616 is the primary reference for electrical and mechanical data.","Also listed with substitute types: B-7153, BD-206, JAN-8423, NL-7153.","Sockets: SK112 (standard wiring), SK130 (printed circuit)."],"references":["https://frank.pocnet.net/sheets/084/b/B6091.pdf","https://frank.pocnet.net/other/Burroughs/616.pdf"],"source_urls":{"r_type":null,"tdsl":null,"radiomuseum":null},"raw_equivalents":["8423","NL-8423"],"equivalents":[],"similar":[{"type_number":"7153","reason":"Super size Nixie indicator on B13B base — Regular variant, same electrical ratings but standard viewing angle","has_detail_page":false},{"type_number":"B6033","reason":"Super size Nixie indicator on B13B base — Long Life variant (not Wide Angle), same pin connections","has_detail_page":false}],"pins":[{"pin_number":"1","function":"Internal Connection","function_code":"ic","notes":null},{"pin_number":"2","function":"Anode","function_code":"a","notes":null},{"pin_number":"3","function":"Numeral 0 Cathode","function_code":"n0","notes":null},{"pin_number":"4","function":"Numeral 9 Cathode","function_code":"n9","notes":null},{"pin_number":"5","function":"Numeral 8 Cathode","function_code":"n8","notes":null},{"pin_number":"6","function":"Numeral 7 Cathode","function_code":"n7","notes":null},{"pin_number":"7","function":"Numeral 6 Cathode","function_code":"n6","notes":null},{"pin_number":"8","function":"Internal Connection","function_code":"ic","notes":null},{"pin_number":"9","function":"Numeral 5 Cathode","function_code":"n5","notes":null},{"pin_number":"10","function":"Numeral 4 Cathode","function_code":"n4","notes":null},{"pin_number":"11","function":"Numeral 3 Cathode","function_code":"n3","notes":null},{"pin_number":"12","function":"Numeral 2 Cathode","function_code":"n2","notes":null},{"pin_number":"13","function":"Numeral 1 Cathode","function_code":"n1","notes":null}],"specs":[],"sections":[{"section_number":1,"section_label":"Nixie Indicator","tube_type_key":"nixie_indicator","specs":[{"key":"Ik_max","display_name":"Cathode Current (max)","value":"4.0","numeric_value":"4","unit":"mA","param_group":"absolute_max"},{"key":"Ik","display_name":"Cathode Current (typical)","value":"1.5","numeric_value":"1.5","unit":"mA","param_group":"typical_operating"},{"key":"V_ionize","display_name":"Ionization Voltage (max)","value":"170","numeric_value":"170","unit":"V","param_group":"nixie"},{"key":"V_supply_min","display_name":"Supply Voltage (min)","value":"170","numeric_value":"170","unit":"V","param_group":"nixie"},{"key":"Ik_peak","display_name":"Cathode Current (peak)","value":"4.5","numeric_value":"4.5","unit":"mA","param_group":"nixie"},{"key":"V_prebias","display_name":"Cathode Prebias Voltage","value":"65","numeric_value":"65","unit":"V","param_group":"nixie"}]}],"synced_at":"2026-04-07T12:36:33.698Z"}