{"type_number":"12DQ6","canonical_url":"https://tubeofile.com/tubes/12DQ6","manufacturer":"GE","tube_type_key":"beam_tetrode","tube_type_display_name":"Beam Tetrode","base_name":"Octal","description":"Beam power amplifier with 12.6V heater, primarily designed for horizontal deflection amplifier service in television receivers. 12.6V series-string heater variant of the 6DQ6. Also usable as an audio output tube in suitable circuits. Widely used in television sets from 1955 through the 1960s.","is_directly_heated":false,"completeness":"medium","notes":["GE Essential Characteristics lists two variants: 12DQ6 and 12DQ6-A with slightly different gm (5500 vs 6600 umhos).","Designed for horizontal deflection amplifier service — peak anode voltage can reach 6000V during flyback.","Max plate dissipation 15W, max plate voltage 550V (DC), max screen voltage 175V.","12.6V/0.6A heater for series-string operation in television receivers.","Brans Vademecum cross-lists extensively with 6BQ6, 6CU6, 6DQ6, 6EM5, and their 12V/17V/25V heater variants."],"references":["https://tdsl.duncanamps.com/show.php?des=12DQ6","https://www.radiomuseum.org/tubes/?tube=12DQ6"],"source_urls":{"r_type":null,"tdsl":"https://tdsl.duncanamps.com/show.php?des=12DQ6","radiomuseum":"https://www.radiomuseum.org/tubes/tube_12dq6.html"},"raw_equivalents":["12DQ6A","12DQ6B"],"equivalents":[],"similar":[{"type_number":"12CU6","reason":"Brans lists as equivalent — similar beam power tube for horizontal deflection, same heater","has_detail_page":false},{"type_number":"17DQ6","reason":"Same tube with 16.8V heater — different series-string voltage","has_detail_page":false},{"type_number":"6DQ6","reason":"Electrically identical but 6.3V heater — not interchangeable in series-string heater circuits","has_detail_page":true},{"type_number":"6GW6","reason":"Brans lists in same group — similar beam power tube but 6.3V heater","has_detail_page":false}],"pins":[{"pin_number":"1","function":"No Connection","function_code":"nc","notes":null},{"pin_number":"2","function":"Heater","function_code":"h","notes":null},{"pin_number":"3","function":"Plate","function_code":"a","notes":null},{"pin_number":"4","function":"Screen Grid (g2)","function_code":"g2","notes":null},{"pin_number":"5","function":"Control Grid (g1)","function_code":"g1","notes":null},{"pin_number":"6","function":"No Connection","function_code":"nc","notes":null},{"pin_number":"7","function":"Heater","function_code":"h","notes":null},{"pin_number":"8","function":"Cathode","function_code":"k","notes":null}],"specs":[{"key":"Vh","display_name":"Heater Voltage","value":"12.6","numeric_value":"12.6","unit":"V","param_group":"heater"},{"key":"Ah","display_name":"Heater Current","value":"0.6","numeric_value":"0.6","unit":"A","param_group":"heater"}],"sections":[{"section_number":1,"section_label":"Beam Tetrode","tube_type_key":"beam_tetrode","specs":[{"key":"Va_max","display_name":"Anode Voltage (max)","value":"550","numeric_value":"550","unit":"V","param_group":"absolute_max"},{"key":"Va_peak_max","display_name":"Peak Anode Voltage (max)","value":"6000","numeric_value":"6000","unit":"V","param_group":"absolute_max"},{"key":"Vg2_max","display_name":"Screen Voltage (max)","value":"175","numeric_value":"175","unit":"V","param_group":"absolute_max"},{"key":"Pa_max","display_name":"Anode Dissipation (max)","value":"15","numeric_value":"15","unit":"W","param_group":"absolute_max"},{"key":"Pg2_max","display_name":"Screen Dissipation (max)","value":"2.5","numeric_value":"2.5","unit":"W","param_group":"absolute_max"},{"key":"Ik_max","display_name":"Cathode Current (max)","value":"120","numeric_value":"120","unit":"mA","param_group":"absolute_max"},{"key":"Va","display_name":"Anode Voltage (typical)","value":"250","numeric_value":"250","unit":"V","param_group":"typical_operating"},{"key":"Vg","display_name":"Grid 1 Bias Voltage","value":"-22.5","numeric_value":"-22.5","unit":"V","param_group":"typical_operating"},{"key":"Vg2","display_name":"Screen Voltage","value":"150","numeric_value":"150","unit":"V","param_group":"typical_operating"},{"key":"mAa","display_name":"Anode Current","value":"75","numeric_value":"75","unit":"mA","param_group":"typical_operating"},{"key":"mAg2","display_name":"Screen Current","value":"2.4","numeric_value":"2.4","unit":"mA","param_group":"typical_operating"},{"key":"ra","display_name":"Anode Resistance","value":"20000","numeric_value":"20000","unit":"Ω","param_group":"typical_operating"},{"key":"gm","display_name":"Transconductance","value":"6","numeric_value":"6","unit":"mA/V","param_group":"typical_operating"},{"key":"Cgp","display_name":"Grid-to-Plate Capacitance","value":"0.55","numeric_value":"0.55","unit":"pF","param_group":"capacitances"},{"key":"Cgk","display_name":"Grid-to-Cathode Capacitance","value":"15","numeric_value":"15","unit":"pF","param_group":"capacitances"},{"key":"Cout","display_name":"Output Capacitance","value":"7","numeric_value":"7","unit":"pF","param_group":"capacitances"}]}],"synced_at":"2026-04-07T12:04:56.680Z"}