{"type_number":"19BG6G","canonical_url":"https://tubeofile.com/tubes/19BG6G","manufacturer":null,"tube_type_key":"beam_tetrode","tube_type_display_name":"Beam Tetrode","base_name":"Octal","description":"Beam power amplifier with top-cap plate connection. 19V heater version of the 6BG6G, designed for series-string heater circuits in AC/DC television receivers. Electrically identical to the 6BG6G. Octal base with top-cap anode.","is_directly_heated":false,"completeness":"high","notes":["19V heater version of the 6BG6G. Heater current is approximately 0.3A at 18.9V (valve_equivalents) for series-string operation in AC/DC TV receivers.","SAMs substitution guide lists 19BG6GA as a direct substitute.","The plate (anode) connection is via a top cap — this provides high-voltage insulation needed for TV horizontal deflection service where peak plate voltages can reach 6600V.","Maximum peak positive plate voltage is 6600V and peak negative plate voltage is 1500V — these extreme ratings are for TV flyback pulse operation.","In stages operating with grid-leak bias, an adequate cathode bias resistor is required to protect the tube in the absence of excitation."],"references":["https://frank.pocnet.net/sheets/127/6/6BG6G.pdf"],"source_urls":{"r_type":null,"tdsl":"https://tdsl.duncanamps.com/show.php?des=19BG6G","radiomuseum":"https://www.radiomuseum.org/tubes/tube_19bg6g.html"},"raw_equivalents":["19BG6GA"],"equivalents":[],"similar":[{"type_number":"6BG6G","reason":"Electrically identical but 6.3V/0.9A heater — not a drop-in in 19V series heater circuits","has_detail_page":false},{"type_number":"6L6","reason":"Electrically similar (same gm=6000, same ra=25k) but 6L6 has internal plate on Octal base — 6BG6/19BG6 has top-cap plate","has_detail_page":true}],"pins":[{"pin_number":"1","function":"No Connection (shell)","function_code":"nc","notes":null},{"pin_number":"2","function":"Heater","function_code":"h","notes":null},{"pin_number":"3","function":"Control Grid (g1)","function_code":"g1","notes":null},{"pin_number":"4","function":"Screen Grid (g2)","function_code":"g2","notes":null},{"pin_number":"5","function":"No Connection","function_code":"nc","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},{"pin_number":"top","function":"Anode (top cap)","function_code":"a","notes":null}],"specs":[{"key":"Vh","display_name":"Heater Voltage","value":"18.9","numeric_value":"18.9","unit":"V","param_group":"heater"},{"key":"Ah","display_name":"Heater Current","value":"0.3","numeric_value":"0.3","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":"700","numeric_value":"700","unit":"V","param_group":"absolute_max"},{"key":"Vs_max","display_name":"Screen Voltage (max)","value":"350","numeric_value":"350","unit":"V","param_group":"absolute_max"},{"key":"Pa_max","display_name":"Anode Dissipation (max)","value":"20","numeric_value":"20","unit":"W","param_group":"absolute_max"},{"key":"Ps_max","display_name":"Screen Dissipation (max)","value":"3.2","numeric_value":"3.2","unit":"W","param_group":"absolute_max"},{"key":"Ik_max","display_name":"Cathode Current (max)","value":"110","numeric_value":"110","unit":"mA","param_group":"absolute_max"},{"key":"Vhk_max","display_name":"Heater-to-Cathode Voltage (max)","value":"200","numeric_value":"200","unit":"V","param_group":"absolute_max"},{"key":"Rg_max","display_name":"Max Grid Resistor","value":"0.47","numeric_value":"0.47","unit":"MΩ","param_group":"absolute_max"},{"key":"Va","display_name":"Anode Voltage (typical)","value":"250","numeric_value":"250","unit":"V","param_group":"typical_operating"},{"key":"Vs","display_name":"Screen Voltage (typical)","value":"250","numeric_value":"250","unit":"V","param_group":"typical_operating"},{"key":"Vg","display_name":"Grid 1 Bias Voltage","value":"-15","numeric_value":"-15","unit":"V","param_group":"typical_operating"},{"key":"mAa","display_name":"Anode Current","value":"75","numeric_value":"75","unit":"mA","param_group":"typical_operating"},{"key":"mAs","display_name":"Screen Current","value":"4","numeric_value":"4","unit":"mA","param_group":"typical_operating"},{"key":"ra","display_name":"Anode Resistance","value":"25000","numeric_value":"25000","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":"0.34","numeric_value":"0.34","unit":"pF","param_group":"capacitances"},{"key":"Cin","display_name":"Input Capacitance","value":"12","numeric_value":"12","unit":"pF","param_group":"capacitances"},{"key":"Cout","display_name":"Output Capacitance","value":"6.5","numeric_value":"6.5","unit":"pF","param_group":"capacitances"}]},{"section_number":2,"section_label":"Triode Strapped","tube_type_key":"power_triode","specs":[{"key":"mu","display_name":"Amplification Factor (μ)","value":"8","numeric_value":"8","unit":"—","param_group":"typical_operating"}]}],"synced_at":"2026-04-07T12:06:49.478Z"}