{"type_number":"E80CC","canonical_url":"https://tubeofile.com/tubes/E80CC","manufacturer":"Philips","tube_type_key":"small_signal_triode","tube_type_display_name":"Small Signal Triode","base_name":"Noval","description":"Special quality (SQ) double triode with frame grid construction for professional equipment. Matched sections, guaranteed 10,000 hour life. Originally designed for computing and switching; highly regarded as an audio voltage amplifier due to excellent linearity and low noise.","is_directly_heated":false,"completeness":"high","notes":["Pin 9 is a heater shield (internal screen), NOT a heater center-tap. Circuits relying on the center-tap of ECC82/ECC83 (pin 9) for hum reduction need modification when using E80CC.","Heater current is 0.6 A at 6.3 V — double that of ECC82/ECC83 (0.3 A). The heater supply must accommodate the extra current before substituting.","Compared to ECC82 (12AU7): higher μ (27 vs 17), higher gm (2.7 vs 2.2 mA/V), higher ra (10 vs 7.7 kΩ), lower Pa_max (2.0 vs 2.75 W). Signal pins are compatible but not a drop-in replacement due to heater differences.","Compared to ECC83 (12AX7): much lower μ (27 vs 100) but higher gm (2.7 vs 1.6 mA/V) and much lower ra (10 vs 62.5 kΩ). Better current drive capability, lower gain. Signal pins compatible but heater pin 9 and current differ.","Frame grid construction gives tighter tolerances, lower noise (noise factor 4.6 dB), and better section matching than wound-grid consumer types (ECC82/83).","Parallel heater: 6.3 V / 0.6 A. Series heater: 12.6 V / 0.3 A. No center-tap available.","Vibration proof: 2.5 g at 50 Hz for 96 hours; impact acceleration approx. 300 g."],"references":["https://tube-data.com/sheets/030/e/E80CC.pdf"],"source_urls":{"r_type":"http://www.r-type.org/exhib/aaa0426.htm","tdsl":"http://tdsl.duncanamps.com/show.php?des=E80CC","radiomuseum":"https://www.radiomuseum.org/tubes/tube_e80cc.html"},"raw_equivalents":["6085","CV5989"],"equivalents":[],"similar":[{"type_number":"6N1P","reason":"Soviet Noval double triode listed as Russian substitute — different pinout (pin 9 is not shield) and different characteristics (µ=35 vs µ=27)","has_detail_page":true},{"type_number":"6N3P","reason":"Soviet Noval double triode listed as Russian substitute — different heater current and characteristics, not a direct drop-in","has_detail_page":false}],"pins":[{"pin_number":"1","function":"Anode (triode 1)","function_code":"a1","notes":null},{"pin_number":"2","function":"Grid (triode 1)","function_code":"g1_1","notes":null},{"pin_number":"3","function":"Cathode (triode 1)","function_code":"k1","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 (triode 2)","function_code":"a2","notes":null},{"pin_number":"7","function":"Grid (triode 2)","function_code":"g1_2","notes":null},{"pin_number":"8","function":"Cathode (triode 2)","function_code":"k2","notes":null},{"pin_number":"9","function":"Heater Shield (internal screen)","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":"0.6","numeric_value":"0.6","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":"300","numeric_value":"300","unit":"V","param_group":"absolute_max"},{"key":"Pa_max","display_name":"Anode Dissipation (max)","value":"2.0","numeric_value":"2","unit":"W","param_group":"absolute_max"},{"key":"Ik_max","display_name":"Cathode Current (max)","value":"12","numeric_value":"12","unit":"mA","param_group":"absolute_max"},{"key":"Vhk_max","display_name":"Heater-to-Cathode Voltage (max)","value":"120","numeric_value":"120","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":"250","numeric_value":"250","unit":"V","param_group":"typical_operating"},{"key":"Vg","display_name":"Grid 1 Bias Voltage","value":"-5.5","numeric_value":"-5.5","unit":"V","param_group":"typical_operating"},{"key":"mAa","display_name":"Anode Current","value":"6.0","numeric_value":"6","unit":"mA","param_group":"typical_operating"},{"key":"ra","display_name":"Anode Resistance","value":"10000","numeric_value":"10000","unit":"Ω","param_group":"typical_operating"},{"key":"gm","display_name":"Transconductance","value":"2.7","numeric_value":"2.7","unit":"mA/V","param_group":"typical_operating"},{"key":"mu","display_name":"Amplification Factor (μ)","value":"27","numeric_value":"27","unit":"—","param_group":"typical_operating"},{"key":"Cgp","display_name":"Grid-to-Plate Capacitance","value":"3.0","numeric_value":"3","unit":"pF","param_group":"capacitances"},{"key":"Cin","display_name":"Input Capacitance","value":"2.6","numeric_value":"2.6","unit":"pF","param_group":"capacitances"},{"key":"Cout","display_name":"Output Capacitance","value":"3.5","numeric_value":"3.5","unit":"pF","param_group":"capacitances"}]}],"synced_at":"2026-04-07T12:37:45.639Z"}