{"type_number":"ECC802S","canonical_url":"https://tubeofile.com/tubes/ECC802S","manufacturer":"Telefunken","tube_type_key":"small_signal_triode","tube_type_display_name":"Small Signal Triode","base_name":"Noval","description":"A.F. twin triode, non-microphonic, special quality long-life version of ECC82/12AU7 with tighter tolerances and extended anode structure. Guaranteed 10,000 hour life (averaged over 100 tubes). Indirectly heated, connected in parallel.","is_directly_heated":false,"completeness":"high","notes":["Special quality (S-suffix) tube: tighter manufacturing tolerances, longer burn-in, and more critical testing than standard ECC82.","Guaranteed life of 10,000 hours (averaged over 100 tubes), provided heater voltage is held within +/-5% of nominal.","Vibration and shock proof: withstands 2.5g at 50 Hz for lengthy periods and 500g momentary shocks.","Cathode free from interface: the special cathode will not develop interface resistance even when operated without plate current over lengthy periods.","Max grid resistor depends on bias method: 1 MΩ for cathode (automatic) bias, 0.5 MΩ for fixed bias.","Heater cycling rated for at least 2,000 on/off cycles (1 min on, 1 min off) at Uf=7.5V, Uf/k(k neg)=135V.","Originally manufactured by Telefunken and Tesla. JJ Electronic currently produces the ECC802S with identical electrical ratings."],"references":["https://frank.pocnet.net/sheets/117/e/ECC802S.pdf","https://www.jj-electronic.com/images/stories/product/preamplifying_tubes/pdf/ecc802s.pdf"],"source_urls":{"r_type":null,"tdsl":"https://tdsl.duncanamps.com/show.php?des=ECC802S","radiomuseum":"https://www.radiomuseum.org/tubes/tube_ecc802s.html"},"raw_equivalents":["ECC82","12AU7","E82CC","6189","5814A","CV4003","B329","CV4016"],"equivalents":[{"type_number":"12AU7","equivalence_type":"direct","notes":null},{"type_number":"ECC82","equivalence_type":"direct","notes":null}],"similar":[{"type_number":"6N1P-EV","reason":"Russian substitute per Kainel'son & Larionov (1981). Different base (Noval B9A but Russian pinout convention) — verify pin compatibility before substitution","has_detail_page":false},{"type_number":"6N5P","reason":"Russian substitute per Kainel'son & Larionov (1981). Different base — verify pin compatibility before substitution","has_detail_page":true}],"pins":[{"pin_number":"1","function":"Anode 2 (Triode section 2)","function_code":"a2","notes":null},{"pin_number":"2","function":"Control Grid 2 (Triode section 2)","function_code":"g1_2","notes":null},{"pin_number":"3","function":"Cathode 2 (Triode section 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 (Triode section 1)","function_code":"a1","notes":null},{"pin_number":"7","function":"Control Grid 1 (Triode section 1)","function_code":"g1_1","notes":null},{"pin_number":"8","function":"Cathode 1 (Triode section 1)","function_code":"k1","notes":null},{"pin_number":"9","function":"Heater center tap","function_code":"h","notes":null}],"specs":[{"key":"Vh","display_name":"Heater Voltage","value":"12.6","numeric_value":"12.6","unit":"V","param_group":"heater"},{"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":"0.15","numeric_value":"0.15","unit":"A","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","tube_type_key":"small_signal_triode","specs":[{"key":"Va_max","display_name":"Anode Voltage (max)","value":"330","numeric_value":"330","unit":"V","param_group":"absolute_max"},{"key":"Pa_max","display_name":"Anode Dissipation (max)","value":"3","numeric_value":"3","unit":"W","param_group":"absolute_max"},{"key":"Ik_max","display_name":"Cathode Current (max)","value":"22","numeric_value":"22","unit":"mA","param_group":"absolute_max"},{"key":"Vhk_max","display_name":"Heater-to-Cathode Voltage (max)","value":"100","numeric_value":"100","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":"Rg_max","display_name":"Max Grid Resistor","value":"0.5","numeric_value":"0.5","unit":"MΩ","param_group":"absolute_max"},{"key":"Va","display_name":"Anode Voltage (typical)","value":"250","numeric_value":"250","unit":"V","param_group":"typical_operating"},{"key":"Vg","display_name":"Grid 1 Bias Voltage","value":"-8.5","numeric_value":"-8.5","unit":"V","param_group":"typical_operating"},{"key":"mAa","display_name":"Anode Current","value":"10.5","numeric_value":"10.5","unit":"mA","param_group":"typical_operating"},{"key":"ra","display_name":"Anode Resistance","value":"7700","numeric_value":"7700","unit":"Ω","param_group":"typical_operating"},{"key":"gm","display_name":"Transconductance","value":"2.2","numeric_value":"2.2","unit":"mA/V","param_group":"typical_operating"},{"key":"mu","display_name":"Amplification Factor (μ)","value":"17","numeric_value":"17","unit":"—","param_group":"typical_operating"},{"key":"Rk","display_name":"Cathode Resistor (self-bias)","value":"800","numeric_value":"800","unit":"Ω","param_group":"typical_operating"},{"key":"Cgp","display_name":"Grid-to-Plate Capacitance","value":"1.5","numeric_value":"1.5","unit":"pF","param_group":"capacitances"},{"key":"Cgk","display_name":"Grid-to-Cathode Capacitance","value":"1.6","numeric_value":"1.6","unit":"pF","param_group":"capacitances"},{"key":"Cak","display_name":"Anode-to-Cathode Capacitance","value":"0.5","numeric_value":"0.5","unit":"pF","param_group":"capacitances"}]}],"synced_at":"2026-04-07T12:39:12.685Z"}