{"type_number":"6AF11","canonical_url":"https://tubeofile.com/tubes/6AF11","manufacturer":"RCA","tube_type_key":"compound","tube_type_display_name":"Compound (multi-section)","base_name":"Compactron","description":"Dual Triode-Sharp Cutoff Pentode in a 12-pin Compactron envelope. Contains two independent triode units (one high-mu, one medium-mu) and a sharp-cutoff pentode. Designed for audio and general-purpose amplifier service in television receivers. The dual triode has a high-mu unit (mu=68) and a medium-mu unit (mu=41), while the pentode is intended for video IF or general AF amplifier service.","is_directly_heated":false,"completeness":"high","notes":["Triode Unit No.1 is the high-mu section (mu=68), Triode Unit No.2 is the medium-mu section (mu=41).","The pentode section shares a common cathode with the pentode grid No.3 (suppressor) internally connected to cathode.","Pin 9 is the pentode cathode and also the pentode grid No.3 and internal shield connection.","Maximum grid-circuit resistance (fixed bias): pentode 0.25 MO, triode 0.5 MO. Cathode bias: pentode 1 MO, triode 1 MO.","Interelectrode capacitance from pentode plate to triode No.2 plate is 0.045 pF max, triode No.1 to triode No.2 plate is 0.06 pF max."],"references":["https://frank.pocnet.net/sheets/049/6/6AF11.pdf"],"source_urls":{"r_type":null,"tdsl":"https://tdsl.duncanamps.com/show.php?des=6AF11","radiomuseum":"https://www.radiomuseum.org/tubes/tube_6af11.html"},"raw_equivalents":["6BD11"],"equivalents":[{"type_number":"6BD11","equivalence_type":"direct","notes":null}],"similar":[{"type_number":"6AF9","reason":"Similar Compactron triode-pentode compound but with different section configuration and ratings","has_detail_page":false}],"pins":[{"pin_number":"1","function":"Heater","function_code":"h","notes":null},{"pin_number":"2","function":"Pentode Plate","function_code":"a_p","notes":null},{"pin_number":"3","function":"Grid of Triode Unit No.2","function_code":"g1_t2","notes":null},{"pin_number":"4","function":"Plate of Triode Unit No.2","function_code":"a_t2","notes":null},{"pin_number":"5","function":"Cathode of Triode Unit No.1","function_code":"k_t1","notes":null},{"pin_number":"6","function":"Grid of Triode Unit No.1","function_code":"g1_t1","notes":null},{"pin_number":"7","function":"Cathode of Triode Unit No.2, Internal Shield","function_code":"k_t2","notes":null},{"pin_number":"8","function":"Plate of Triode Unit No.1","function_code":"a_t1","notes":null},{"pin_number":"9","function":"Pentode Cathode, Pentode Grid No.3, Internal Shield","function_code":"k_p","notes":null},{"pin_number":"10","function":"Pentode Screen Grid (Grid No.2)","function_code":"g2_p","notes":null},{"pin_number":"11","function":"Pentode Control Grid (Grid No.1)","function_code":"g1_p","notes":null},{"pin_number":"12","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":"1.05","numeric_value":"1.05","unit":"A","param_group":"heater"}],"sections":[{"section_number":1,"section_label":"Triode No.1 (High-Mu)","tube_type_key":"small_signal_triode","specs":[{"key":"Va_max","display_name":"Anode Voltage (max)","value":"330","numeric_value":"330","unit":"V","param_group":"absolute_max"},{"key":"Pa_max","display_name":"Anode Dissipation (max)","value":"1.1","numeric_value":"1.1","unit":"W","param_group":"absolute_max"},{"key":"Vhk_max","display_name":"Heater-to-Cathode Voltage (max)","value":"100","numeric_value":"100","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":"200","numeric_value":"200","unit":"V","param_group":"typical_operating"},{"key":"Vg","display_name":"Grid 1 Bias Voltage","value":"-2","numeric_value":"-2","unit":"V","param_group":"typical_operating"},{"key":"mAa","display_name":"Anode Current","value":"7","numeric_value":"7","unit":"mA","param_group":"typical_operating"},{"key":"ra","display_name":"Anode Resistance","value":"12400","numeric_value":"12400","unit":"Ω","param_group":"typical_operating"},{"key":"gm","display_name":"Transconductance","value":"5.5","numeric_value":"5.5","unit":"mA/V","param_group":"typical_operating"},{"key":"mu","display_name":"Amplification Factor (μ)","value":"68","numeric_value":"68","unit":"—","param_group":"typical_operating"},{"key":"Cgp","display_name":"Grid-to-Plate Capacitance","value":"1.9","numeric_value":"1.9","unit":"pF","param_group":"capacitances"},{"key":"Cin","display_name":"Input Capacitance","value":"3.0","numeric_value":"3","unit":"pF","param_group":"capacitances"},{"key":"Cout","display_name":"Output Capacitance","value":"2.2","numeric_value":"2.2","unit":"pF","param_group":"capacitances"}]},{"section_number":2,"section_label":"Triode No.2 (Medium-Mu)","tube_type_key":"small_signal_triode","specs":[{"key":"Va_max","display_name":"Anode Voltage (max)","value":"330","numeric_value":"330","unit":"V","param_group":"absolute_max"},{"key":"Pa_max","display_name":"Anode Dissipation (max)","value":"1.1","numeric_value":"1.1","unit":"W","param_group":"absolute_max"},{"key":"Vhk_max","display_name":"Heater-to-Cathode Voltage (max)","value":"100","numeric_value":"100","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":"200","numeric_value":"200","unit":"V","param_group":"typical_operating"},{"key":"Vg","display_name":"Grid 1 Bias Voltage","value":"-2","numeric_value":"-2","unit":"V","param_group":"typical_operating"},{"key":"mAa","display_name":"Anode Current","value":"9.2","numeric_value":"9.2","unit":"mA","param_group":"typical_operating"},{"key":"ra","display_name":"Anode Resistance","value":"9400","numeric_value":"9400","unit":"Ω","param_group":"typical_operating"},{"key":"gm","display_name":"Transconductance","value":"4.4","numeric_value":"4.4","unit":"mA/V","param_group":"typical_operating"},{"key":"mu","display_name":"Amplification Factor (μ)","value":"41","numeric_value":"41","unit":"—","param_group":"typical_operating"},{"key":"Cgp","display_name":"Grid-to-Plate Capacitance","value":"3.6","numeric_value":"3.6","unit":"pF","param_group":"capacitances"},{"key":"Cin","display_name":"Input Capacitance","value":"2.4","numeric_value":"2.4","unit":"pF","param_group":"capacitances"},{"key":"Cout","display_name":"Output Capacitance","value":"3.8","numeric_value":"3.8","unit":"pF","param_group":"capacitances"}]},{"section_number":3,"section_label":"Pentode","tube_type_key":"ss_pentode","specs":[{"key":"Va_max","display_name":"Anode Voltage (max)","value":"330","numeric_value":"330","unit":"V","param_group":"absolute_max"},{"key":"Vs_max","display_name":"Screen Voltage (max)","value":"330","numeric_value":"330","unit":"V","param_group":"absolute_max"},{"key":"Pa_max","display_name":"Anode Dissipation (max)","value":"2","numeric_value":"2","unit":"W","param_group":"absolute_max"},{"key":"Ps_max","display_name":"Screen Dissipation (max)","value":"5","numeric_value":"5","unit":"W","param_group":"absolute_max"},{"key":"Vhk_max","display_name":"Heater-to-Cathode Voltage (max)","value":"100","numeric_value":"100","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 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