{"type_number":"5965","canonical_url":"https://tubeofile.com/tubes/5965","manufacturer":"RCA","tube_type_key":"small_signal_triode","tube_type_display_name":"Small Signal Triode","base_name":"Noval","description":"Medium-mu dual triode designed for computer and industrial applications. Miniature Noval base with 12.6V heater. Ruggedized version with controlled characteristics, suitable for switching, multivibrator, and DC amplifier circuits.","is_directly_heated":false,"completeness":"high","notes":["12.6V heater only — cannot be wired for 6.3V parallel heater operation (no center-tap).","Designed primarily for computer switching circuits, DC amplifiers, and industrial control applications.","Controlled-characteristics tube with tighter tolerances than consumer equivalents.","GE Essential Characteristics lists Pa_max as 2.4 W per section, Va_max as 300 V."],"references":["https://frank.pocnet.net/sheets/049/5/5965.pdf","https://tdsl.duncanamps.com/show.php?des=5965"],"source_urls":{"r_type":null,"tdsl":"https://tdsl.duncanamps.com/show.php?des=5965","radiomuseum":"https://www.radiomuseum.org/tubes/tube_5965.html"},"raw_equivalents":["5965A"],"equivalents":[],"similar":[{"type_number":"12AU7","reason":"Similar medium-mu dual triode on Noval base but different operating characteristics — higher mu (17 vs 16.5) and different plate resistance. Not a guaranteed drop-in.","has_detail_page":true},{"type_number":"12AV7","reason":"Similar medium-mu dual triode on Noval base (mu=16.5) but optimized for different applications — verify compatibility","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":"12.6","numeric_value":"12.6","unit":"V","param_group":"heater"},{"key":"Ah","display_name":"Heater Current","value":"0.225","numeric_value":"0.225","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":"2.4","numeric_value":"2.4","unit":"W","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":"Va","display_name":"Anode Voltage (typical)","value":"150","numeric_value":"150","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":"7.5","numeric_value":"7.5","unit":"mA","param_group":"typical_operating"},{"key":"ra","display_name":"Anode Resistance","value":"5500","numeric_value":"5500","unit":"Ω","param_group":"typical_operating"},{"key":"gm","display_name":"Transconductance","value":"3.0","numeric_value":"3","unit":"mA/V","param_group":"typical_operating"},{"key":"mu","display_name":"Amplification Factor (μ)","value":"16.5","numeric_value":"16.5","unit":"—","param_group":"typical_operating"}]}],"synced_at":"2026-04-07T12:11:38.682Z"}