{"type_number":"6S3P","canonical_url":"https://tubeofile.com/tubes/6S3P","manufacturer":null,"tube_type_key":"small_signal_triode","tube_type_display_name":"Small Signal Triode","base_name":"Noval","description":"Soviet UHF triode (6С3П) designed for grounded-grid RF amplifier and oscillator service at frequencies up to 600 MHz. Noval base, indirectly heated. Equivalent to the Western EC86/6CM4. Frame-grid construction provides high transconductance and low transit-time effects.","is_directly_heated":false,"completeness":"high","notes":["Cyrillic designation: 6С3П. Foreign_substitutes.json confirms: EC86 → 6S3P, 6S4P.","Designed for VHF/UHF front-end stages, particularly grounded-grid RF amplifiers in FM/TV receivers.","Frame-grid construction gives very high transconductance (up to 15 mA/V) for a small-signal triode.","Internal shield connected to pin 9 provides inter-element shielding at UHF frequencies."],"references":["https://www.radiomuseum.org/tubes/tube_6s3p.html"],"source_urls":{"r_type":null,"tdsl":null,"radiomuseum":"https://www.radiomuseum.org/tubes/tube_6s3p.html"},"raw_equivalents":["EC86","6CM4"],"equivalents":[{"type_number":"EC86","equivalence_type":"direct","notes":null}],"similar":[{"type_number":"6S4P","reason":"Higher-frequency variant — also listed as a substitute for EC86/EC88 in Soviet references","has_detail_page":true},{"type_number":"EC88","reason":"Philips UHF triode — Soviet 6S4P is listed as substitute but 6S3P is closer to EC86","has_detail_page":true}],"pins":[{"pin_number":"1","function":"Anode","function_code":"a","notes":null},{"pin_number":"2","function":"No Connection","function_code":"nc","notes":null},{"pin_number":"3","function":"Cathode","function_code":"k","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":"No Connection","function_code":"nc","notes":null},{"pin_number":"7","function":"Grid","function_code":"g1","notes":null},{"pin_number":"8","function":"Cathode","function_code":"k","notes":null},{"pin_number":"9","function":"Internal Shield","function_code":"is","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":"0.35","numeric_value":"0.35","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":"180","numeric_value":"180","unit":"V","param_group":"absolute_max"},{"key":"Pa_max","display_name":"Anode Dissipation (max)","value":"2.2","numeric_value":"2.2","unit":"W","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":"-1","numeric_value":"-1","unit":"V","param_group":"typical_operating"},{"key":"mAa","display_name":"Anode Current","value":"14","numeric_value":"14","unit":"mA","param_group":"typical_operating"},{"key":"ra","display_name":"Anode Resistance","value":"3300","numeric_value":"3300","unit":"Ω","param_group":"typical_operating"},{"key":"gm","display_name":"Transconductance","value":"15","numeric_value":"15","unit":"mA/V","param_group":"typical_operating"},{"key":"mu","display_name":"Amplification Factor (μ)","value":"50","numeric_value":"50","unit":"—","param_group":"typical_operating"},{"key":"Cgp","display_name":"Grid-to-Plate Capacitance","value":"1.6","numeric_value":"1.6","unit":"pF","param_group":"capacitances"},{"key":"Cin","display_name":"Input Capacitance","value":"4.5","numeric_value":"4.5","unit":"pF","param_group":"capacitances"},{"key":"Cout","display_name":"Output Capacitance","value":"1.6","numeric_value":"1.6","unit":"pF","param_group":"capacitances"}]}],"synced_at":"2026-04-07T12:28:18.968Z"}