{"type_number":"6BX7","canonical_url":"https://tubeofile.com/tubes/6BX7","manufacturer":"General Electric","tube_type_key":"power_triode","tube_type_display_name":"Power Triode","base_name":"Octal","description":"High-transconductance twin power triode with octal base. Originally designed for use as a combined vertical deflection amplifier and oscillator in television receivers. Each section features high plate current at low plate voltages. Also used in audio amplifier and driver applications.","is_directly_heated":false,"completeness":"high","notes":["Maximum plate dissipation is 10 W per section, 12 W total for both sections combined.","When operated as a combined vertical deflection amplifier and oscillator, it is recommended that section 1 (pins 4, 5, and 6) be used as the oscillator.","In stages operating with grid leak bias, an adequate cathode bias resistor or other suitable means is required to protect the tube in the absence of excitation.","The 6BL7GT is a near-equivalent with similar pinout but slightly different characteristics (mu=5.6 vs mu=10); substitution may require circuit adjustment."],"references":["https://frank.pocnet.net/sheets/093/6/6BX7GT.pdf","https://frank.pocnet.net/sheets/127/6/6BX7GT.pdf"],"source_urls":{"r_type":"https://www.r-type.org/exhib/aaq0481.htm","tdsl":"https://tdsl.duncanamps.com/show.php?des=6BX7GT","radiomuseum":"https://www.radiomuseum.org/tubes/tube_6bx7gt.html"},"raw_equivalents":["6BX7GT"],"equivalents":[],"similar":[{"type_number":"6BL7GT","reason":"Similar pinout but different mu (15 vs 10) and ra (2150 vs 1300 ohms) — substitution may require circuit adjustment","has_detail_page":false},{"type_number":"6BL7GTA","reason":"Revised 6BL7 with same differences — mu 15 vs 10, higher ra","has_detail_page":false},{"type_number":"6DN7","reason":"Similar application but different characteristics — not a direct drop-in replacement","has_detail_page":true}],"pins":[{"pin_number":"1","function":"Grid (section 2)","function_code":"g1_2","notes":null},{"pin_number":"2","function":"Plate (section 2)","function_code":"a2","notes":null},{"pin_number":"3","function":"Cathode (section 2)","function_code":"k2","notes":null},{"pin_number":"4","function":"Grid (section 1)","function_code":"g1_1","notes":null},{"pin_number":"5","function":"Plate (section 1)","function_code":"a1","notes":null},{"pin_number":"6","function":"Cathode (section 1)","function_code":"k1","notes":null},{"pin_number":"7","function":"Heater","function_code":"h","notes":null},{"pin_number":"8","function":"Heater","function_code":"h","notes":null}],"specs":[{"key":"Vh","display_name":"Heater Voltage","value":"6.3","numeric_value":"6.3","unit":"V","param_group":"heater"},{"key":"Ah","display_name":"Heater Current","value":"1.5","numeric_value":"1.5","unit":"A","param_group":"heater"}],"sections":[{"section_number":1,"section_label":"Triode (each section)","tube_type_key":"power_triode","specs":[{"key":"Va_max","display_name":"Anode Voltage (max)","value":"500","numeric_value":"500","unit":"V","param_group":"absolute_max"},{"key":"Pa_max","display_name":"Anode Dissipation (max)","value":"10","numeric_value":"10","unit":"W","param_group":"absolute_max"},{"key":"Ik_max","display_name":"Cathode Current (max)","value":"60","numeric_value":"60","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":"2.2","numeric_value":"2.2","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":"Vg","display_name":"Grid 1 Bias Voltage","value":"-40","numeric_value":"-40","unit":"V","param_group":"typical_operating"},{"key":"mAa","display_name":"Anode Current","value":"42","numeric_value":"42","unit":"mA","param_group":"typical_operating"},{"key":"ra","display_name":"Anode Resistance","value":"1300","numeric_value":"1300","unit":"Ω","param_group":"typical_operating"},{"key":"gm","display_name":"Transconductance","value":"7.6","numeric_value":"7.6","unit":"mA/V","param_group":"typical_operating"},{"key":"mu","display_name":"Amplification Factor (μ)","value":"10","numeric_value":"10","unit":"—","param_group":"typical_operating"},{"key":"Rk","display_name":"Cathode Resistor (self-bias)","value":"390","numeric_value":"390","unit":"Ω","param_group":"typical_operating"},{"key":"Cgp","display_name":"Grid-to-Plate Capacitance","value":"4.2","numeric_value":"4.2","unit":"pF","param_group":"capacitances"},{"key":"Cgk","display_name":"Grid-to-Cathode Capacitance","value":"4.4","numeric_value":"4.4","unit":"pF","param_group":"capacitances"},{"key":"Cak","display_name":"Anode-to-Cathode Capacitance","value":"1.1","numeric_value":"1.1","unit":"pF","param_group":"capacitances"}]}],"synced_at":"2026-04-07T12:18:58.904Z"}