{"type_number":"PL82","canonical_url":"https://tubeofile.com/tubes/PL82","manufacturer":"Philips","tube_type_key":"power_pentode","tube_type_display_name":"Power Pentode","base_name":"Noval","description":"Indirectly-heated output pentode for audio and frame (vertical deflection) output; 300mA series-string heater variant of the EL82. Electrically identical to the EL82 except for heater specification (16.5V/0.3A).","is_directly_heated":false,"completeness":"high","notes":["300mA series-string heater (16.5V/0.3A) for AC/DC TV receivers. The 'P' prefix in Mullard/Philips nomenclature denotes a 300mA heater string design.","Valve Equivalents database confirms B9A base, 16.5V heater.","Philips interchange lists 16A5 as the American equivalent designation.","Brans Vademecum lists equivalents: 16A5, N142, UL41.","Electrically identical to EL82 in all electrode characteristics; only the heater differs.","Not interchangeable with EL82 without heater circuit modification."],"references":["https://tdsl.duncanamps.com/show.php?des=PL82","https://www.radiomuseum.org/tubes/?tube=PL82"],"source_urls":{"r_type":null,"tdsl":"https://tdsl.duncanamps.com/show.php?des=PL82","radiomuseum":"https://www.radiomuseum.org/tubes/tube_pl82.html"},"raw_equivalents":["16A5"],"equivalents":[],"similar":[{"type_number":"EL82","reason":"Same electrical characteristics but 6.3V/0.8A parallel heater — not a drop-in in 300mA series-string circuits","has_detail_page":true},{"type_number":"UL41","reason":"Listed as equivalent in Brans — 100mA series-heater pentode with similar characteristics","has_detail_page":true}],"pins":[{"pin_number":"1","function":"No Connection (internal screen)","function_code":"nc","notes":null},{"pin_number":"2","function":"Suppressor Grid (internally connected to cathode)","function_code":"g3","notes":null},{"pin_number":"3","function":"Control Grid","function_code":"g1","notes":null},{"pin_number":"4","function":"Cathode","function_code":"k","notes":null},{"pin_number":"5","function":"Heater","function_code":"h","notes":null},{"pin_number":"6","function":"Heater","function_code":"h","notes":null},{"pin_number":"7","function":"Anode","function_code":"a","notes":null},{"pin_number":"8","function":"Screen Grid","function_code":"g2","notes":null},{"pin_number":"9","function":"Control Grid (second terminal)","function_code":"g1","notes":null}],"specs":[{"key":"Vh","display_name":"Heater Voltage","value":"16.5","numeric_value":"16.5","unit":"V","param_group":"heater"},{"key":"Ah","display_name":"Heater Current","value":"0.3","numeric_value":"0.3","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":"250","numeric_value":"250","unit":"V","param_group":"absolute_max"},{"key":"Pa_max","display_name":"Anode Dissipation (max)","value":"9","numeric_value":"9","unit":"W","param_group":"absolute_max"},{"key":"Ps_max","display_name":"Screen Dissipation (max)","value":"2.5","numeric_value":"2.5","unit":"W","param_group":"absolute_max"},{"key":"Ik_max","display_name":"Cathode Current (max)","value":"75","numeric_value":"75","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":"1","numeric_value":"1","unit":"MΩ","param_group":"absolute_max"},{"key":"Rg_max","display_name":"Max Grid Resistor","value":"0.4","numeric_value":"0.4","unit":"MΩ","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":"-10.4","numeric_value":"-10.4","unit":"V","param_group":"typical_operating"},{"key":"mAa","display_name":"Anode Current","value":"53","numeric_value":"53","unit":"mA","param_group":"typical_operating"},{"key":"mAs","display_name":"Screen Current","value":"10","numeric_value":"10","unit":"mA","param_group":"typical_operating"},{"key":"ra","display_name":"Anode Resistance","value":"20000","numeric_value":"20000","unit":"Ω","param_group":"typical_operating"},{"key":"gm","display_name":"Transconductance","value":"9","numeric_value":"9","unit":"mA/V","param_group":"typical_operating"},{"key":"Rk","display_name":"Cathode Resistor (self-bias)","value":"165","numeric_value":"165","unit":"Ω","param_group":"typical_operating"},{"key":"Pout","display_name":"Output Power","value":"4","numeric_value":"4","unit":"W","param_group":"output"},{"key":"rl","display_name":"Load Impedance","value":"3000","numeric_value":"3000","unit":"Ω","param_group":"output"},{"key":"Cgp","display_name":"Grid-to-Plate Capacitance","value":"<1","numeric_value":null,"unit":"pF","param_group":"capacitances"},{"key":"Cin","display_name":"Input Capacitance","value":"11","numeric_value":"11","unit":"pF","param_group":"capacitances"},{"key":"Cout","display_name":"Output Capacitance","value":"5.9","numeric_value":"5.9","unit":"pF","param_group":"capacitances"},{"key":null,"display_name":"Amplification Factor (g2/g1)","value":"10","numeric_value":"10","unit":null,"param_group":null}]},{"section_number":2,"section_label":"Triode Strapped","tube_type_key":"power_triode","specs":[{"key":"Va_max","display_name":"Anode Voltage (max)","value":"250","numeric_value":"250","unit":"V","param_group":"absolute_max"},{"key":"Pa_max","display_name":"Anode Dissipation (max)","value":"9","numeric_value":"9","unit":"W","param_group":"absolute_max"},{"key":"Ik_max","display_name":"Cathode Current (max)","value":"75","numeric_value":"75","unit":"mA","param_group":"absolute_max"},{"key":"ra","display_name":"Anode Resistance","value":"1000","numeric_value":"1000","unit":"Ω","param_group":"typical_operating"},{"key":"gm","display_name":"Transconductance","value":"9.0","numeric_value":"9","unit":"mA/V","param_group":"typical_operating"},{"key":"mu","display_name":"Amplification Factor (μ)","value":"8.8","numeric_value":"8.8","unit":"—","param_group":"typical_operating"}]}],"synced_at":"2026-04-07T12:50:55.410Z"}