{"type_number":"6FW5","canonical_url":"https://tubeofile.com/tubes/6FW5","manufacturer":"General Electric","tube_type_key":"beam_tetrode","tube_type_display_name":"Beam Tetrode","base_name":"Octal","description":"Beam Pentode for TV horizontal-deflection amplifier applications.","is_directly_heated":false,"completeness":"medium","notes":["6-pin octal base (EIA 6CK / B6-112) — pins 4 and 6 are absent from the base. Fits a standard octal socket but only 6 pins are present on the tube.","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.","Grid-Number 1 Circuit Resistance maximum: 1 MΩ.","Peak cathode current 550 mA — this is a pulse rating for horizontal-deflection service where duty cycle must not exceed 15% of one scanning cycle.","Heater-cathode voltage: ±200 V max (DC + peak, both polarities)."],"references":["https://frank.yueksel.org/sheets/093/6/6FW5.pdf"],"source_urls":{"r_type":null,"tdsl":"https://tdsl.duncanamps.com/show.php?des=6FW5","radiomuseum":"https://www.radiomuseum.org/tubes/tube_6fw5.html"},"raw_equivalents":[],"equivalents":[],"similar":[],"pins":[{"pin_number":"1","function":"Grid 1 (Control Grid)","function_code":"g1","notes":null},{"pin_number":"2","function":"Heater","function_code":"h","notes":null},{"pin_number":"3","function":"Cathode and Beam Plates","function_code":"k","notes":null},{"pin_number":"4","function":"No Connection (pin absent from 6-pin base)","function_code":"nc","notes":null},{"pin_number":"5","function":"Plate (Anode)","function_code":"a","notes":null},{"pin_number":"6","function":"No Connection (pin absent from 6-pin base)","function_code":"nc","notes":null},{"pin_number":"7","function":"Heater","function_code":"h","notes":null},{"pin_number":"8","function":"Grid 2 (Screen)","function_code":"g2","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":"1.2","numeric_value":"1.2","unit":"A","param_group":"heater"}],"sections":[{"section_number":1,"section_label":"Pentode","tube_type_key":"beam_tetrode","specs":[{"key":"Va_max","display_name":"Anode Voltage (max)","value":"770","numeric_value":"770","unit":"V","param_group":"absolute_max"},{"key":"Vg2_max","display_name":"Screen Voltage (max)","value":"220","numeric_value":"220","unit":"V","param_group":"absolute_max"},{"key":"Pa_max","display_name":"Anode Dissipation (max)","value":"17.5","numeric_value":"17.5","unit":"W","param_group":"absolute_max"},{"key":"Pg2_max","display_name":"Screen Dissipation (max)","value":"3.5","numeric_value":"3.5","unit":"W","param_group":"absolute_max"},{"key":"Ik_max","display_name":"Cathode Current (max)","value":"175","numeric_value":"175","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":"1","numeric_value":"1","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":"-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":"6.6","numeric_value":"6.6","unit":"mA/V","param_group":"typical_operating"},{"key":"Cgp","display_name":"Grid-to-Plate Capacitance","value":"0.5","numeric_value":"0.5","unit":"pF","param_group":"capacitances"},{"key":"Cin","display_name":"Input Capacitance","value":"17","numeric_value":"17","unit":"pF","param_group":"capacitances"},{"key":"Cout","display_name":"Output Capacitance","value":"7.0","numeric_value":"7","unit":"pF","param_group":"capacitances"}]},{"section_number":2,"section_label":"Triode Strapped","tube_type_key":"small_signal_triode","specs":[{"key":"Va","display_name":"Anode Voltage (typical)","value":"150","numeric_value":"150","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":"mu","display_name":"Amplification Factor (μ)","value":"4.1","numeric_value":"4.1","unit":"—","param_group":"typical_operating"}]}],"synced_at":"2026-04-07T12:24:00.296Z"}