{"type_number":"6P33P","canonical_url":"https://tubeofile.com/tubes/6P33P","manufacturer":null,"tube_type_key":"power_pentode","tube_type_display_name":"Power Pentode","base_name":"Noval","description":"Soviet output pentode (6П33П) designed for AF output stages. Noval base, indirectly heated. Equivalent to the Western EL86/6CW5. Compact construction with relatively high power output for its size. Widely used in Soviet television receivers and audio equipment.","is_directly_heated":false,"completeness":"high","notes":["Cyrillic designation: 6П33П. Russian_equivalents.json confirms: 6P33P ≈ 6CW5/EL86.","From 6CW5 Tung-Sol datasheet: Va=170V, Vs=170V, Vg=-12.5V, Ia=70mA, Is=5mA, gm=10000 µmhos, ra=23kΩ.","Maximum ratings: Va_max=250V, Vs_max=200V, Pa_max=12W, Ps_max=1.75W, Ik_max=100mA.","Amplification factor (g2 to g1): 8. The EL86/6CW5 is designed for relatively low supply voltages compared to EL84.","Output power: 5.6W single-ended Class A, 5.9W push-pull per pair."],"references":["https://frank.pocnet.net/sheets/127/6/6CW5.pdf","https://www.radiomuseum.org/tubes/tube_6p33p.html"],"source_urls":{"r_type":null,"tdsl":null,"radiomuseum":"https://www.radiomuseum.org/tubes/tube_6p33p.html"},"raw_equivalents":["EL86","6CW5"],"equivalents":[],"similar":[{"type_number":"6P14P","reason":"Soviet EL84 equivalent — similar Noval output pentode but different power rating and characteristics","has_detail_page":true},{"type_number":"PL84","reason":"Series-heater version of EL84 — different heater voltage, not compatible","has_detail_page":true}],"pins":[{"pin_number":"1","function":"Internal Connection","function_code":"ic","notes":null},{"pin_number":"2","function":"Grid 1","function_code":"g1","notes":null},{"pin_number":"3","function":"Cathode / Grid 3","function_code":"k","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":"Internal Connection","function_code":"ic","notes":null},{"pin_number":"7","function":"Anode","function_code":"a","notes":null},{"pin_number":"8","function":"Internal Connection","function_code":"ic","notes":null},{"pin_number":"9","function":"Grid 2 (Screen)","function_code":"g2","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":"0.76","numeric_value":"0.76","unit":"A","param_group":"heater"}],"sections":[{"section_number":1,"section_label":"Pentode","tube_type_key":"power_pentode","specs":[{"key":"Va_max","display_name":"Anode Voltage (max)","value":"250","numeric_value":"250","unit":"V","param_group":"absolute_max"},{"key":"Vs_max","display_name":"Screen Voltage (max)","value":"200","numeric_value":"200","unit":"V","param_group":"absolute_max"},{"key":"Pa_max","display_name":"Anode Dissipation (max)","value":"12","numeric_value":"12","unit":"W","param_group":"absolute_max"},{"key":"Ps_max","display_name":"Screen Dissipation (max)","value":"1.75","numeric_value":"1.75","unit":"W","param_group":"absolute_max"},{"key":"Ik_max","display_name":"Cathode Current (max)","value":"100","numeric_value":"100","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":"Va","display_name":"Anode Voltage (typical)","value":"170","numeric_value":"170","unit":"V","param_group":"typical_operating"},{"key":"Vs","display_name":"Screen Voltage (typical)","value":"170","numeric_value":"170","unit":"V","param_group":"typical_operating"},{"key":"Vg","display_name":"Grid 1 Bias Voltage","value":"-12.5","numeric_value":"-12.5","unit":"V","param_group":"typical_operating"},{"key":"mAa","display_name":"Anode Current","value":"70","numeric_value":"70","unit":"mA","param_group":"typical_operating"},{"key":"mAs","display_name":"Screen Current","value":"5","numeric_value":"5","unit":"mA","param_group":"typical_operating"},{"key":"ra","display_name":"Anode Resistance","value":"23000","numeric_value":"23000","unit":"Ω","param_group":"typical_operating"},{"key":"gm","display_name":"Transconductance","value":"10","numeric_value":"10","unit":"mA/V","param_group":"typical_operating"},{"key":"Pout","display_name":"Output Power","value":"5.6","numeric_value":"5.6","unit":"W","param_group":"output"},{"key":"rl","display_name":"Load Impedance","value":"2400","numeric_value":"2400","unit":"Ω","param_group":"output"},{"key":"Cgp","display_name":"Grid-to-Plate Capacitance","value":"0.6","numeric_value":"0.6","unit":"pF","param_group":"capacitances"},{"key":"Cin","display_name":"Input Capacitance","value":"12","numeric_value":"12","unit":"pF","param_group":"capacitances"},{"key":"Cout","display_name":"Output Capacitance","value":"6","numeric_value":"6","unit":"pF","param_group":"capacitances"}]}],"synced_at":"2026-04-07T12:27:42.986Z"}