{"type_number":"6N5S","canonical_url":"https://tubeofile.com/tubes/6N5S","manufacturer":"Svetlana","tube_type_key":"power_triode","tube_type_display_name":"Power Triode","base_name":"Octal","description":"Soviet twin power triode with separate indirectly heated cathodes and low internal resistance, designed for electronic voltage stabilizer circuits. Can also be used as a low-frequency power amplifier in push-pull output stages. Glass octal envelope, equivalent to the 6AS7G/6N13S family.","is_directly_heated":false,"completeness":"high","notes":["Also written as 6Н5С in Cyrillic. The Latin transliteration 6H5C is used interchangeably in Western markets.","The 6N5S is an earlier Soviet production variant in the same family as the 6N13S (6Н13С). Commercial sources and multiple vendors confirm them as interchangeable equivalents with identical pinout and nearly identical specifications.","Soviet datasheet specifies typical parameters at Va=90V, Vg=-30V: Ia=80mA, gm=5.5 mA/V, ra≤460 Ω per triode. The Western 6AS7G (Tung-Sol) specifies mu=2.0 and gm=7.0 mA/V at different operating conditions (Va=135V, Rk=250Ω).","Maximum ratings per triode: Va=250V, Pa=13W, Ik=130mA. Grid circuit resistance must not exceed 1 MΩ.","Works in any mounting position. Minimum rated service life: 2000 hours."],"references":["https://soviet-tubes.com/product/high-quality-double-triode-6n5s-tube-low-resistance-strong-signal-amplification-great-sound-detail-equivalent-to-the-6as7g-ecc230-6n13s/","https://frank.pocnet.net/sheets/127/6/6AS7G.pdf"],"source_urls":{"r_type":null,"tdsl":null,"radiomuseum":"https://www.radiomuseum.org/tubes/tube_6n5s.html"},"raw_equivalents":["6AS7","6AS7G","6AS7GA","6080","6080WA","6080WB","6520","6N13S","6H13C","CV2523","CV2984","CV10322","CK6080","E6080","ECC230","A1834","A4475","EI834","RK6080","6N13P"],"equivalents":[{"type_number":"6080","equivalence_type":"direct","notes":null},{"type_number":"6AS7","equivalence_type":"direct","notes":null},{"type_number":"6AS7G","equivalence_type":"direct","notes":null},{"type_number":"6H13C","equivalence_type":"direct","notes":null},{"type_number":"6N13P","equivalence_type":"direct","notes":null}],"similar":[{"type_number":"5998","reason":"Same Octal pinout but approximately double the mu (5.4 vs 2.5) and gm (15.5 vs 5.5 mA/V) — changes bias points, not a drop-in","has_detail_page":true},{"type_number":"6N5P","reason":"Noval (9-pin) base variant of similar design — not pin-compatible with Octal 6N5S","has_detail_page":true}],"pins":[{"pin_number":"1","function":"Grid (triode 2)","function_code":"g1_2","notes":null},{"pin_number":"2","function":"Anode (triode 2)","function_code":"a2","notes":null},{"pin_number":"3","function":"Cathode (triode 2)","function_code":"k2","notes":null},{"pin_number":"4","function":"Grid (triode 1)","function_code":"g1_1","notes":null},{"pin_number":"5","function":"Anode (triode 1)","function_code":"a1","notes":null},{"pin_number":"6","function":"Cathode (triode 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":"2.5","numeric_value":"2.5","unit":"A","param_group":"heater"}],"sections":[{"section_number":1,"section_label":"Triode","tube_type_key":"power_triode","specs":[{"key":"Va_max","display_name":"Anode Voltage (max)","value":"250","numeric_value":"250","unit":"V","param_group":"absolute_max"},{"key":"Pa_max","display_name":"Anode Dissipation (max)","value":"13","numeric_value":"13","unit":"W","param_group":"absolute_max"},{"key":"Ik_max","display_name":"Cathode Current (max)","value":"130","numeric_value":"130","unit":"mA","param_group":"absolute_max"},{"key":"Vhk_max","display_name":"Heater-to-Cathode Voltage (max)","value":"300","numeric_value":"300","unit":"V","param_group":"absolute_max"},{"key":"Rg_max","display_name":"Max Grid Resistor","value":"1.0","numeric_value":"1","unit":"MΩ","param_group":"absolute_max"},{"key":"Va","display_name":"Anode Voltage (typical)","value":"90","numeric_value":"90","unit":"V","param_group":"typical_operating"},{"key":"Vg","display_name":"Grid 1 Bias Voltage","value":"-30","numeric_value":"-30","unit":"V","param_group":"typical_operating"},{"key":"mAa","display_name":"Anode Current","value":"80","numeric_value":"80","unit":"mA","param_group":"typical_operating"},{"key":"ra","display_name":"Anode Resistance","value":"460","numeric_value":"460","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":"2.5","numeric_value":"2.5","unit":"—","param_group":"typical_operating"},{"key":"Cgp","display_name":"Grid-to-Plate Capacitance","value":"9","numeric_value":"9","unit":"pF","param_group":"capacitances"},{"key":"Cgk","display_name":"Grid-to-Cathode Capacitance","value":"7","numeric_value":"7","unit":"pF","param_group":"capacitances"},{"key":"Cak","display_name":"Anode-to-Cathode Capacitance","value":"4.2","numeric_value":"4.2","unit":"pF","param_group":"capacitances"}]}],"synced_at":"2026-04-07T19:04:51.825Z"}