{"type_number":"6N7","canonical_url":"https://tubeofile.com/tubes/6N7","manufacturer":"RCA","tube_type_key":"small_signal_triode","tube_type_display_name":"Small Signal Triode","base_name":"Octal","description":"Medium-mu twin power triode with common cathode. Designed primarily for Class B push-pull audio output service (10W) or as a Class A1 driver. Both triode sections share a single cathode connection.","is_directly_heated":false,"completeness":"high","notes":["Common cathode — both triode sections share pin 8. Individual cathode biasing per section is not possible.","Class A1 Pa_max is only 1.0 W per plate; Class B Pa_max is 5.5 W per plate. The tube is primarily intended for Class B push-pull service.","Rg_max is 0.5 MΩ with cathode bias, but only 0.1 MΩ with fixed bias.","Two 6N7s (or 6N7Gs) can be paralleled in Class B (4 triode units total) for approximately 20 W output at 300 V on a 5000 Ω plate-to-plate load.","6N7 has a metal shell envelope; 6N7GT/G has a T-9 glass envelope with intermediate shell and octal base. Electrically identical.","Predecessor type 6A6 has the same electrical characteristics but uses a different base (UX6, 6-pin).","ECC31 (Mullard) is similar but has different characteristics: higher heater current (0.95A), lower mu (32), and higher ra (14 kΩ). Not a drop-in replacement in critical applications."],"references":["https://www.r-type.org/pdfs/6n7.pdf","https://frank.pocnet.net/sheets/127/6/6N7.pdf","https://frank.pocnet.net/sheets/093/6/6N7.pdf"],"source_urls":{"r_type":"https://www.r-type.org/exhib/aaa0902.htm","tdsl":"https://tdsl.duncanamps.com/show.php?des=6N7","radiomuseum":"https://www.radiomuseum.org/tubes/tube_6n7.html"},"raw_equivalents":["6N7G","6N7GT","CV1285","CV1957","VT-96","6Z7","6Z7G","5694"],"equivalents":[],"similar":[{"type_number":"6A6","reason":"Same electricals but UX6 (6-pin) base — not Octal","has_detail_page":true},{"type_number":"ECC31","reason":"Similar twin triode but different mu (32 vs 35), higher heater current (0.95A vs 0.8A)","has_detail_page":true}],"pins":[{"pin_number":"1","function":"Shell (6N7) / No Connection (6N7GT/G)","function_code":"nc","notes":null},{"pin_number":"2","function":"Heater","function_code":"h","notes":null},{"pin_number":"3","function":"Anode 2","function_code":"a2","notes":null},{"pin_number":"4","function":"Control Grid 2","function_code":"g1_2","notes":null},{"pin_number":"5","function":"Control Grid 1","function_code":"g1_1","notes":null},{"pin_number":"6","function":"Anode 1","function_code":"a1","notes":null},{"pin_number":"7","function":"Heater","function_code":"h","notes":null},{"pin_number":"8","function":"Cathode (common)","function_code":"k","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":"0.8","numeric_value":"0.8","unit":"A","param_group":"heater"}],"sections":[{"section_number":1,"section_label":"Triode (Class A1)","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":"5.5","numeric_value":"5.5","unit":"W","param_group":"absolute_max"},{"key":"Ik_max","display_name":"Cathode Current (max)","value":"125","numeric_value":"125","unit":"mA","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":"-5","numeric_value":"-5","unit":"V","param_group":"typical_operating"},{"key":"mAa","display_name":"Anode Current","value":"6","numeric_value":"6","unit":"mA","param_group":"typical_operating"},{"key":"ra","display_name":"Anode Resistance","value":"11300","numeric_value":"11300","unit":"Ω","param_group":"typical_operating"},{"key":"gm","display_name":"Transconductance","value":"3.1","numeric_value":"3.1","unit":"mA/V","param_group":"typical_operating"},{"key":"mu","display_name":"Amplification Factor (μ)","value":"35","numeric_value":"35","unit":"—","param_group":"typical_operating"},{"key":"Pout","display_name":"Output Power","value":"10","numeric_value":"10","unit":"W","param_group":"output"},{"key":"rl","display_name":"Load Impedance","value":"8000","numeric_value":"8000","unit":"Ω","param_group":"output"}]}],"synced_at":"2026-04-07T12:27:27.318Z"}