{"type_number":"6F5P","canonical_url":"https://tubeofile.com/tubes/6F5P","manufacturer":null,"tube_type_key":"triode_pentode","tube_type_display_name":"Triode-Pentode","base_name":"Noval","description":"Soviet triode-pentode (6Ф5П) for combined AF amplifier and output stage applications. Noval base, indirectly heated. Equivalent to the Western ECL85/6GV8. Contains a triode section for voltage amplification and a pentode section for power output in a single envelope.","is_directly_heated":false,"completeness":"high","notes":["Cyrillic designation: 6Ф5П. Russian_equivalents.json confirms: 6F5P ≈ 6GV8, ECL85.","Foreign_substitutes.json also confirms: ECL86 → 6F5P (noting ECL86/6GW8 as Western substitute).","The triode section provides voltage gain, and the pentode section provides power output — a complete audio amplifier in one envelope.","Commonly used in Soviet television audio output stages and compact radio receivers.","The ECL85 was designed for relatively low supply voltages (~200V B+)."],"references":["https://www.radiomuseum.org/tubes/tube_6f5p.html"],"source_urls":{"r_type":null,"tdsl":null,"radiomuseum":"https://www.radiomuseum.org/tubes/tube_6f5p.html"},"raw_equivalents":["ECL85","6GV8"],"equivalents":[],"similar":[{"type_number":"6F3P","reason":"Soviet ECL82/6BM8 equivalent — similar triode-pentode concept but different characteristics","has_detail_page":true},{"type_number":"6GW8","reason":"ECL86 equivalent — similar concept but different electrical characteristics","has_detail_page":true},{"type_number":"ECL86","reason":"Later triode-pentode (6GW8) — higher pentode output, different pinout","has_detail_page":false}],"pins":[{"pin_number":"1","function":"Pentode Anode","function_code":"a2","notes":null},{"pin_number":"2","function":"Pentode Screen Grid","function_code":"g2","notes":null},{"pin_number":"3","function":"Pentode Control Grid","function_code":"g1_2","notes":null},{"pin_number":"4","function":"Heater","function_code":"h","notes":null},{"pin_number":"5","function":"Heater","function_code":"h","notes":null},{"pin_number":"6","function":"Triode Anode","function_code":"a1","notes":null},{"pin_number":"7","function":"Triode Grid","function_code":"g1_1","notes":null},{"pin_number":"8","function":"Cathode (common)","function_code":"k","notes":null},{"pin_number":"9","function":"Pentode Suppressor / Internal Shield","function_code":"g3","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":"0.76","numeric_value":"0.76","unit":"A","param_group":"heater"}],"sections":[{"section_number":1,"section_label":"Triode","tube_type_key":"small_signal_triode","specs":[{"key":"Va_max","display_name":"Anode Voltage (max)","value":"300","numeric_value":"300","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":"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":"-1","numeric_value":"-1","unit":"V","param_group":"typical_operating"},{"key":"mAa","display_name":"Anode Current","value":"10","numeric_value":"10","unit":"mA","param_group":"typical_operating"},{"key":"ra","display_name":"Anode Resistance","value":"7800","numeric_value":"7800","unit":"Ω","param_group":"typical_operating"},{"key":"gm","display_name":"Transconductance","value":"6","numeric_value":"6","unit":"mA/V","param_group":"typical_operating"},{"key":"mu","display_name":"Amplification Factor (μ)","value":"47","numeric_value":"47","unit":"—","param_group":"typical_operating"}]},{"section_number":2,"section_label":"Pentode","tube_type_key":"power_pentode","specs":[{"key":"Va_max","display_name":"Anode Voltage (max)","value":"300","numeric_value":"300","unit":"V","param_group":"absolute_max"},{"key":"Vs_max","display_name":"Screen Voltage (max)","value":"300","numeric_value":"300","unit":"V","param_group":"absolute_max"},{"key":"Pa_max","display_name":"Anode Dissipation (max)","value":"9","numeric_value":"9","unit":"W","param_group":"absolute_max"},{"key":"Ps_max","display_name":"Screen Dissipation (max)","value":"2","numeric_value":"2","unit":"W","param_group":"absolute_max"},{"key":"Va","display_name":"Anode Voltage (typical)","value":"200","numeric_value":"200","unit":"V","param_group":"typical_operating"},{"key":"Vs","display_name":"Screen Voltage (typical)","value":"200","numeric_value":"200","unit":"V","param_group":"typical_operating"},{"key":"Vg","display_name":"Grid 1 Bias Voltage","value":"-7.5","numeric_value":"-7.5","unit":"V","param_group":"typical_operating"},{"key":"mAa","display_name":"Anode Current","value":"40","numeric_value":"40","unit":"mA","param_group":"typical_operating"},{"key":"mAs","display_name":"Screen Current","value":"6","numeric_value":"6","unit":"mA","param_group":"typical_operating"},{"key":"gm","display_name":"Transconductance","value":"10","numeric_value":"10","unit":"mA/V","param_group":"typical_operating"},{"key":"Pout","display_name":"Output Power","value":"3.4","numeric_value":"3.4","unit":"W","param_group":"output"}]}],"synced_at":"2026-04-07T12:22:58.831Z"}