{"type_number":"ECC86","canonical_url":"https://tubeofile.com/tubes/ECC86","manufacturer":"Philips/Mullard","tube_type_key":"small_signal_triode","tube_type_display_name":"Small Signal Triode","base_name":"Noval","description":"Low-voltage double triode designed for R.F. amplifier and self-oscillating mixer in car radio sets, directly operated from a 6V storage battery","is_directly_heated":false,"completeness":"high","notes":["The ECC86 was specifically designed for hybrid car radio applications where the tube operates directly from a 6V car battery. Both sections are identical.","Typical anode voltage is only 6.3V, with maximum anode voltage of 30V per section — far lower than conventional receiving tubes.","One triode section is typically used as an RF amplifier, the other as a self-oscillating mixer in VHF/FM front-end stages.","Can also operate at 12.6V anode supply (from a 12V car battery) with improved performance: higher gm (4.6 mA/V) and anode current (2.5 mA).","The Philips datasheet is marked 'Tentative data' (Vorläufige Daten), first issued 3.3.1958."],"references":["https://frank.pocnet.net/sheets/030/e/ECC86.pdf","https://tdsl.duncanamps.com/show.php?des=ECC86","https://www.radiomuseum.org/tubes/tube_ecc86.html"],"source_urls":{"r_type":null,"tdsl":"https://tdsl.duncanamps.com/show.php?des=ECC86","radiomuseum":"https://www.radiomuseum.org/tubes/tube_ecc86.html"},"raw_equivalents":["6GM8"],"equivalents":[],"similar":[{"type_number":"6463","reason":"Similar low-voltage twin triode for car radio use, but different ratings — not a direct substitute","has_detail_page":false},{"type_number":"6N27P","reason":"Soviet equivalent (6Н27П) — approximate substitute per foreign_substitutes reference, may differ in parameter spread","has_detail_page":false},{"type_number":"ECC813","reason":"Related low-voltage twin triode, different ratings per TDSL","has_detail_page":false}],"pins":[{"pin_number":"1","function":"Anode 2","function_code":"a2","notes":null},{"pin_number":"2","function":"Control Grid 2","function_code":"g1_2","notes":null},{"pin_number":"3","function":"Cathode 2","function_code":"k2","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":"Anode 1","function_code":"a1","notes":null},{"pin_number":"7","function":"Control Grid 1","function_code":"g1_1","notes":null},{"pin_number":"8","function":"Cathode 1","function_code":"k1","notes":null},{"pin_number":"9","function":"Internal Connection","function_code":"ia","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":"0.33","numeric_value":"0.33","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":"30","numeric_value":"30","unit":"V","param_group":"absolute_max"},{"key":"Pa_max","display_name":"Anode Dissipation (max)","value":"0.6","numeric_value":"0.6","unit":"W","param_group":"absolute_max"},{"key":"Ik_max","display_name":"Cathode Current (max)","value":"20","numeric_value":"20","unit":"mA","param_group":"absolute_max"},{"key":"Vhk_max","display_name":"Heater-to-Cathode Voltage (max)","value":"30","numeric_value":"30","unit":"V","param_group":"absolute_max"},{"key":"Rg_max","display_name":"Max Grid Resistor","value":"1","numeric_value":"1","unit":"MΩ","param_group":"absolute_max"},{"key":"Va","display_name":"Anode Voltage (typical)","value":"6.3","numeric_value":"6.3","unit":"V","param_group":"typical_operating"},{"key":"Vg","display_name":"Grid 1 Bias Voltage","value":"-0.4","numeric_value":"-0.4","unit":"V","param_group":"typical_operating"},{"key":"mAa","display_name":"Anode Current","value":"0.9","numeric_value":"0.9","unit":"mA","param_group":"typical_operating"},{"key":"ra","display_name":"Anode Resistance","value":"5385","numeric_value":"5385","unit":"Ω","param_group":"typical_operating"},{"key":"gm","display_name":"Transconductance","value":"2.6","numeric_value":"2.6","unit":"mA/V","param_group":"typical_operating"},{"key":"mu","display_name":"Amplification Factor (μ)","value":"14","numeric_value":"14","unit":"—","param_group":"typical_operating"},{"key":"Cgp","display_name":"Grid-to-Plate Capacitance","value":"1.3","numeric_value":"1.3","unit":"pF","param_group":"capacitances"},{"key":"Cin","display_name":"Input Capacitance","value":"3.0","numeric_value":"3","unit":"pF","param_group":"capacitances"},{"key":"Cout","display_name":"Output Capacitance","value":"1.8","numeric_value":"1.8","unit":"pF","param_group":"capacitances"}]}],"synced_at":"2026-04-07T12:39:34.802Z"}