{"type_number":"6N6P","canonical_url":"https://tubeofile.com/tubes/6N6P","manufacturer":null,"tube_type_key":"small_signal_triode","tube_type_display_name":"Small Signal Triode","base_name":"Noval","description":"Soviet double triode with separate cathodes for low-frequency power amplification. Low ra (1.8 kΩ), high gm (11 mA/V), and medium μ (20) make it an excellent driver and low-power output tube. Widely used in headphone amplifiers and as a push-pull driver.","is_directly_heated":false,"completeness":"high","notes":["Cyrillic designation: 6Н6П. Also transliterated as 6H6P or 6H6Pi.","Pin 9 is an internal shield between the two triode sections (same pinout arrangement as E80CC).","Compared to ECC99: similar characteristics but Pa_max is 4 W per section (6N6P) vs 5 W (ECC99). Heater current also differs: 0.75 A (6N6P) vs 0.4 A (ECC99). Not a strict drop-in — verify heater supply capacity.","6N6PI (6Н6ПИ) is a ruggedized variant with higher heater current (0.9 A) and tighter parameter tolerances.","Soviet-specified operating point is Va = 120 V; Western audiophile usage often runs higher (up to 200–250 V) within the 300 V absolute limit and 4 W Pa_max per section.","Heater current (0.75 A) is significantly higher than most Noval double triodes (e.g. 12AU7 at 0.3 A) — verify heater supply capacity before substituting."],"references":["https://tone-lizard.com/wp-content/uploads/2015/08/6n6p-6%D0%9D6%D0%9F.pdf"],"source_urls":{"r_type":null,"tdsl":null,"radiomuseum":"https://www.radiomuseum.org/tubes/tube_6n6p.html"},"raw_equivalents":[],"equivalents":[],"similar":[{"type_number":"E182CC","reason":"Similar Noval double triode but different ratings and heater current — not a strict drop-in","has_detail_page":false},{"type_number":"ECC99","reason":"Similar characteristics but different Pa_max (5W vs 4W) and heater current (0.4A vs 0.75A) — verify heater supply before substituting","has_detail_page":true}],"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":"Internal Shield","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":"0.75","numeric_value":"0.75","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":"4.0","numeric_value":"4","unit":"W","param_group":"absolute_max"},{"key":"Ik_max","display_name":"Cathode Current (max)","value":"50","numeric_value":"50","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":"0.5","numeric_value":"0.5","unit":"MΩ","param_group":"absolute_max"},{"key":"Va","display_name":"Anode Voltage (typical)","value":"120","numeric_value":"120","unit":"V","param_group":"typical_operating"},{"key":"Vg","display_name":"Grid 1 Bias Voltage","value":"-4.5","numeric_value":"-4.5","unit":"V","param_group":"typical_operating"},{"key":"mAa","display_name":"Anode Current","value":"30","numeric_value":"30","unit":"mA","param_group":"typical_operating"},{"key":"ra","display_name":"Anode Resistance","value":"1800","numeric_value":"1800","unit":"Ω","param_group":"typical_operating"},{"key":"gm","display_name":"Transconductance","value":"11","numeric_value":"11","unit":"mA/V","param_group":"typical_operating"},{"key":"mu","display_name":"Amplification Factor (μ)","value":"20","numeric_value":"20","unit":"—","param_group":"typical_operating"}]}],"synced_at":"2026-04-07T12:27:22.360Z"}