{"type_number":"7AU7","canonical_url":"https://tubeofile.com/tubes/7AU7","manufacturer":"GE","tube_type_key":"small_signal_triode","tube_type_display_name":"Small Signal Triode","base_name":"Noval","description":"Medium-mu dissimilar dual triode designed for vertical oscillator and output service in television receivers. Noval base with 7.0V heater. Contains two triode sections with different characteristics — one high-mu section and one medium-mu power section.","is_directly_heated":false,"completeness":"high","notes":["7.0V heater — not compatible with standard 6.3V or 12.6V heater supplies without adjustment.","GE Essential Characteristics: Pa_max 2.75 W, Va_max 300 V, Va(typ) 250V, Vg=-8.5V, Ia=10.5mA, Rp=7700, gm=2200, mu=17.","Designed primarily for TV vertical oscillator/output circuits — the dissimilar sections are optimized for different functions in that application.","Brans Vademecum lists 6DE7 and 9AU7 as equivalents.","Sams lists 6AU7, 6AX7, PCCIB6, XCC, PY301, Z14 as substitutes — verify compatibility carefully."],"references":["https://frank.pocnet.net/sheets/127/7/7AU7.pdf","https://tdsl.duncanamps.com/show.php?des=7AU7"],"source_urls":{"r_type":null,"tdsl":"https://tdsl.duncanamps.com/show.php?des=7AU7","radiomuseum":"https://www.radiomuseum.org/tubes/tube_7au7.html"},"raw_equivalents":["9AU7"],"equivalents":[],"similar":[{"type_number":"6AU7","reason":"Sams lists as substitute — verify heater voltage compatibility (7AU7 is 7.0V vs 6AU7 at 6.3V)","has_detail_page":true},{"type_number":"6DE7","reason":"Brans lists as equivalent — similar dissimilar dual triode but 6.3V heater and different pinout","has_detail_page":true}],"pins":[{"pin_number":"1","function":"Anode (section 1)","function_code":"a1","notes":null},{"pin_number":"2","function":"Control Grid (section 1)","function_code":"g1_1","notes":null},{"pin_number":"3","function":"Cathode (section 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 (section 2)","function_code":"a2","notes":null},{"pin_number":"7","function":"Control Grid (section 2)","function_code":"g1_2","notes":null},{"pin_number":"8","function":"Cathode (section 2)","function_code":"k2","notes":null},{"pin_number":"9","function":"Internal Shield","function_code":"ia","notes":null}],"specs":[{"key":"Vh","display_name":"Heater Voltage","value":"7.0","numeric_value":"7","unit":"V","param_group":"heater"},{"key":"Ah","display_name":"Heater Current","value":"0.65","numeric_value":"0.65","unit":"A","param_group":"heater"}],"sections":[{"section_number":1,"section_label":"Triode (each section)","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":"2.75","numeric_value":"2.75","unit":"W","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"}]}],"synced_at":"2026-04-07T12:32:02.905Z"}