{"type_number":"6FY7","canonical_url":"https://tubeofile.com/tubes/6FY7","manufacturer":"RCA","tube_type_key":"compound","tube_type_display_name":"Compound (multi-section)","base_name":"Compactron","description":"Dissimilar dual triode with high-mu and medium-mu sections in Compactron 12-pin construction. Unit No.1 (high-mu, mu=65) is intended for vertical deflection oscillator service. Unit No.2 (medium-mu, mu=6) is designed for vertical deflection amplifier service in television receivers.","is_directly_heated":false,"completeness":"high","notes":["Dissimilar dual triode: Unit No.1 (high-mu, pins 9/10/11) is a small-signal triode (mu=65, ra=40500 ohm, Pa_max=1W); Unit No.2 (medium-mu, pins 3/5/7) is a power triode (mu=6, ra=920 ohm, Pa_max=7W).","Compactron 12-pin base (Small-Button Duodecar, JEDEC No. E12-70). Basing designation for bottom view: 12EO.","Pin 2 is no internal connection. Pin 4 is no internal connection. Pin 6 is no internal connection. Pin 8 is do not use.","Maximum heater-cathode voltage: 200V peak (negative), 200V peak (positive), 100V DC component.","Grid-voltage for plate current = 25 is -30V (Unit 1) and grid-voltage for plate current = 50 is not specified (Unit 2).","Grid-circuit resistance max 2.2 megohms for both sections."],"references":["https://frank.pocnet.net/sheets/049/6/6FY7.pdf","https://tdsl.duncanamps.com/show.php?des=6FY7","https://www.radiomuseum.org/tubes/tube_6fy7.html"],"source_urls":{"r_type":null,"tdsl":"https://tdsl.duncanamps.com/show.php?des=6FY7","radiomuseum":"https://www.radiomuseum.org/tubes/tube_6fy7.html"},"raw_equivalents":[],"equivalents":[],"similar":[{"type_number":"11FY7","reason":"Radiomuseum lists as similar with different heater voltage (11V series-string heater) — not interchangeable without heater circuit modification","has_detail_page":false},{"type_number":"6EM7","reason":"Similar dissimilar dual triode for vertical deflection but Octal base — different pin topology, not a drop-in","has_detail_page":true},{"type_number":"6GF7","reason":"Similar dissimilar dual triode for vertical deflection but Novar base (not Compactron) — different pin topology, not a drop-in","has_detail_page":true}],"pins":[{"pin_number":"1","function":"Heater","function_code":"h","notes":null},{"pin_number":"2","function":"No Internal Connection","function_code":"nc","notes":null},{"pin_number":"3","function":"Grid (Unit No.2 - Medium-Mu Triode)","function_code":"g1_2","notes":null},{"pin_number":"4","function":"No Internal Connection","function_code":"nc","notes":null},{"pin_number":"5","function":"Plate (Unit No.2 - Medium-Mu Triode)","function_code":"a2","notes":null},{"pin_number":"6","function":"No Internal Connection","function_code":"nc","notes":null},{"pin_number":"7","function":"Cathode (Unit No.2 - Medium-Mu Triode)","function_code":"k2","notes":null},{"pin_number":"8","function":"Do Not Use","function_code":"nc","notes":null},{"pin_number":"9","function":"Cathode (Unit No.1 - High-Mu Triode)","function_code":"k1","notes":null},{"pin_number":"10","function":"Grid (Unit No.1 - High-Mu Triode)","function_code":"g1_1","notes":null},{"pin_number":"11","function":"Plate (Unit No.1 - High-Mu Triode)","function_code":"a1","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":"High-Mu Triode","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","numeric_value":"1","unit":"W","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":"-3","numeric_value":"-3","unit":"V","param_group":"typical_operating"},{"key":"mAa","display_name":"Anode Current","value":"1.4","numeric_value":"1.4","unit":"mA","param_group":"typical_operating"},{"key":"ra","display_name":"Anode Resistance","value":"40500","numeric_value":"40500","unit":"Ω","param_group":"typical_operating"},{"key":"gm","display_name":"Transconductance","value":"1.6","numeric_value":"1.6","unit":"mA/V","param_group":"typical_operating"},{"key":"mu","display_name":"Amplification Factor (μ)","value":"65","numeric_value":"65","unit":"—","param_group":"typical_operating"},{"key":"Cgp","display_name":"Grid-to-Plate Capacitance","value":"4.4","numeric_value":"4.4","unit":"pF","param_group":"capacitances"},{"key":"Cin","display_name":"Input Capacitance","value":"2.2","numeric_value":"2.2","unit":"pF","param_group":"capacitances"},{"key":"Cout","display_name":"Output Capacitance","value":"0.4","numeric_value":"0.4","unit":"pF","param_group":"capacitances"}]},{"section_number":2,"section_label":"Medium-Mu Triode","tube_type_key":"power_triode","specs":[{"key":"Va_max","display_name":"Anode Voltage (max)","value":"275","numeric_value":"275","unit":"V","param_group":"absolute_max"},{"key":"Pa_max","display_name":"Anode Dissipation (max)","value":"7","numeric_value":"7","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":"2.2","numeric_value":"2.2","unit":"MΩ","param_group":"absolute_max"},{"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":"-17.5","numeric_value":"-17.5","unit":"V","param_group":"typical_operating"},{"key":"mAa","display_name":"Anode Current","value":"35","numeric_value":"35","unit":"mA","param_group":"typical_operating"},{"key":"ra","display_name":"Anode Resistance","value":"920","numeric_value":"920","unit":"Ω","param_group":"typical_operating"},{"key":"gm","display_name":"Transconductance","value":"6.5","numeric_value":"6.5","unit":"mA/V","param_group":"typical_operating"},{"key":"mu","display_name":"Amplification Factor (μ)","value":"6","numeric_value":"6","unit":"—","param_group":"typical_operating"},{"key":"Cgp","display_name":"Grid-to-Plate Capacitance","value":"9.5","numeric_value":"9.5","unit":"pF","param_group":"capacitances"},{"key":"Cin","display_name":"Input Capacitance","value":"6.5","numeric_value":"6.5","unit":"pF","param_group":"capacitances"},{"key":"Cout","display_name":"Output Capacitance","value":"1.2","numeric_value":"1.2","unit":"pF","param_group":"capacitances"}]}],"synced_at":"2026-04-07T12:24:07.325Z"}