{"type_number":"6C2C","canonical_url":"https://tubeofile.com/tubes/6C2C","manufacturer":null,"tube_type_key":"triode_hexode","tube_type_display_name":"Triode-Hexode","base_name":"Octal","description":"Soviet triode-hexode frequency converter (6С2С) for superheterodyne receiver applications. Octal base, glass envelope. The type designation '6C2C' is the Latin transliteration of 6С2С, not to be confused with the triode 6S2S (6С2С uses a different Cyrillic letter С for the first character in some transliterations). Contains a triode section for local oscillator and a hexode section for mixer.","is_directly_heated":false,"completeness":"high","notes":["Cyrillic designation: 6С2С. This is a triode-hexode frequency converter, distinct from the triode 6S2S (6С2С in a different transliteration scheme).","The triode section serves as the local oscillator, while the hexode section acts as the mixer.","Designed for superheterodyne receiver front-end circuits.","Soviet-specific design with no exact Western equivalent. The Western 6K8 is functionally similar but not electrically identical."],"references":["https://www.radiomuseum.org/tubes/tube_6s2s.html"],"source_urls":{"r_type":null,"tdsl":null,"radiomuseum":null},"raw_equivalents":[],"equivalents":[],"similar":[{"type_number":"6K8","reason":"Western triode-hexode frequency converter with Octal base — similar function but different internal design","has_detail_page":true},{"type_number":"ECH81","reason":"European triode-heptode frequency converter — similar function, different base (Noval)","has_detail_page":true}],"pins":[{"pin_number":"1","function":"Hexode Grid 1 (signal)","function_code":"g1","notes":null},{"pin_number":"2","function":"Heater","function_code":"h","notes":null},{"pin_number":"3","function":"Hexode Anode","function_code":"a1","notes":null},{"pin_number":"4","function":"Hexode Screen Grid","function_code":"g2","notes":null},{"pin_number":"5","function":"Triode Grid","function_code":"g1_2","notes":null},{"pin_number":"6","function":"Triode Anode","function_code":"a2","notes":null},{"pin_number":"7","function":"Heater","function_code":"h","notes":null},{"pin_number":"8","function":"Cathode (common)","function_code":"k","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":"0.3","numeric_value":"0.3","unit":"A","param_group":"heater"}],"sections":[{"section_number":1,"section_label":"Triode (oscillator)","tube_type_key":"small_signal_triode","specs":[{"key":"Va","display_name":"Anode Voltage (typical)","value":"100","numeric_value":"100","unit":"V","param_group":"typical_operating"},{"key":"gm","display_name":"Transconductance","value":"2.5","numeric_value":"2.5","unit":"mA/V","param_group":"typical_operating"}]},{"section_number":2,"section_label":"Hexode (mixer)","tube_type_key":"hexode","specs":[{"key":"Va","display_name":"Anode Voltage (typical)","value":"250","numeric_value":"250","unit":"V","param_group":"typical_operating"},{"key":"Vs","display_name":"Screen Voltage (typical)","value":"100","numeric_value":"100","unit":"V","param_group":"typical_operating"},{"key":"gm","display_name":"Transconductance","value":"0.5","numeric_value":"0.5","unit":"mA/V","param_group":"typical_operating"}]}],"synced_at":"2026-04-07T12:19:13.344Z"}