{"type_number":"PCL86","canonical_url":"https://tubeofile.com/tubes/PCL86","manufacturer":"Philips","tube_type_key":"triode_pentode","tube_type_display_name":"Triode-Pentode","base_name":"Noval","description":"High-Mu Triode, Sharp-Cutoff Pentode. Compound tube containing a high-mu triode section and a sharp-cutoff power pentode section in a single 9-pin miniature envelope, designed for audio frequency amplifier applications. 300 mA series-heater version of the ECL86/6GW8, for series-string AC/DC receivers.","is_directly_heated":false,"completeness":"high","notes":["Series-heater (300 mA) version of the ECL86/6GW8. Electrically identical sections — only the heater voltage/current differs (14.5 V at 300 mA vs 6.3 V at 660 mA).","14GW8 is the American RETMA designation for the PCL86.","Triode section Rg1 max is 1 MOhm; pentode section Rg1 max is 0.5 MOhm (fixed bias) or 1 MOhm (cathode bias, typical).","Inter-electrode capacitance between triode grid and pentode plate can be reduced below 0.002 pF using a shielding ring (22.5 mm diameter, 15 mm height).","Pentode mu of 21 is measured from grid No.1 to grid No.2, not grid-to-anode."],"references":["https://frank.pocnet.net/sheets/030/p/PCL86.pdf"],"source_urls":{"r_type":null,"tdsl":"https://tdsl.duncanamps.com/show.php?des=PCL86","radiomuseum":"https://www.radiomuseum.org/tubes/tube_pcl86.html"},"raw_equivalents":["14GW8"],"equivalents":[],"similar":[{"type_number":"6F5P","reason":"Soviet triode-pentode (6Ф5П) listed as Russian substitute for ECL86 — similar application but verify pin compatibility and characteristics","has_detail_page":true},{"type_number":"6GW8","reason":"American designation of ECL86 — 6.3 V parallel heater, not series-string compatible","has_detail_page":true},{"type_number":"ECL86","reason":"Identical electricals but 6.3 V parallel heater (6GW8) — not a drop-in in series-string heater circuits","has_detail_page":false}],"pins":[{"pin_number":"1","function":"Triode Grid","function_code":"g1_1","notes":null},{"pin_number":"2","function":"Triode Cathode","function_code":"k1","notes":null},{"pin_number":"3","function":"Pentode Screen Grid (G2)","function_code":"g2","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":"Pentode Anode","function_code":"a2","notes":null},{"pin_number":"7","function":"Pentode Cathode, Suppressor Grid (G3), Internal Shield","function_code":"k2","notes":null},{"pin_number":"8","function":"Pentode Control Grid (G1)","function_code":"g1_2","notes":null},{"pin_number":"9","function":"Triode Anode","function_code":"a1","notes":null}],"specs":[{"key":"Vh","display_name":"Heater Voltage","value":"14.5","numeric_value":"14.5","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":"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":"0.5","numeric_value":"0.5","unit":"W","param_group":"absolute_max"},{"key":"Ik_max","display_name":"Cathode Current (max)","value":"4","numeric_value":"4","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":"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":"-1.9","numeric_value":"-1.9","unit":"V","param_group":"typical_operating"},{"key":"mAa","display_name":"Anode Current","value":"1.2","numeric_value":"1.2","unit":"mA","param_group":"typical_operating"},{"key":"ra","display_name":"Anode Resistance","value":"62500","numeric_value":"62500","unit":"Ω","param_group":"typical_operating"},{"key":"gm","display_name":"Transconductance","value":"1.6","numeric_value":"1.6","unit":"mA/V","param_group":"typical_operating"},{"key":"mu","display_name":"Amplification Factor (μ)","value":"100","numeric_value":"100","unit":"—","param_group":"typical_operating"},{"key":"Cgp","display_name":"Grid-to-Plate Capacitance","value":"1.4","numeric_value":"1.4","unit":"pF","param_group":"capacitances"},{"key":"Cin","display_name":"Input Capacitance","value":"2.3","numeric_value":"2.3","unit":"pF","param_group":"capacitances"},{"key":"Cout","display_name":"Output Capacitance","value":"2.5","numeric_value":"2.5","unit":"pF","param_group":"capacitances"}]},{"section_number":2,"section_label":"Pentode","tube_type_key":"power_pentode","specs":[{"key":"Va_max","display_name":"Anode Voltage (max)","value":"300","numeric_value":"300","unit":"V","param_group":"absolute_max"},{"key":"Vs_max","display_name":"Screen Voltage (max)","value":"300","numeric_value":"300","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":"1.8","numeric_value":"1.8","unit":"W","param_group":"absolute_max"},{"key":"Ik_max","display_name":"Cathode Current (max)","value":"55","numeric_value":"55","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":"250","numeric_value":"250","unit":"V","param_group":"typical_operating"},{"key":"Vs","display_name":"Screen Voltage (typical)","value":"250","numeric_value":"250","unit":"V","param_group":"typical_operating"},{"key":"Vg","display_name":"Grid 1 Bias Voltage","value":"-7","numeric_value":"-7","unit":"V","param_group":"typical_operating"},{"key":"mAa","display_name":"Anode Current","value":"36","numeric_value":"36","unit":"mA","param_group":"typical_operating"},{"key":"mAs","display_name":"Screen Current","value":"6","numeric_value":"6","unit":"mA","param_group":"typical_operating"},{"key":"ra","display_name":"Anode Resistance","value":"48000","numeric_value":"48000","unit":"Ω","param_group":"typical_operating"},{"key":"gm","display_name":"Transconductance","value":"10","numeric_value":"10","unit":"mA/V","param_group":"typical_operating"},{"key":"Rk","display_name":"Cathode Resistor (self-bias)","value":"170","numeric_value":"170","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":"5900","numeric_value":"5900","unit":"Ω","param_group":"output"},{"key":"Cgp","display_name":"Grid-to-Plate Capacitance","value":"0.4","numeric_value":"0.4","unit":"pF","param_group":"capacitances"},{"key":"Cin","display_name":"Input Capacitance","value":"10","numeric_value":"10","unit":"pF","param_group":"capacitances"}]},{"section_number":3,"section_label":"Triode Strapped","tube_type_key":"power_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":"9","numeric_value":"9","unit":"W","param_group":"absolute_max"},{"key":"Ik_max","display_name":"Cathode Current (max)","value":"55","numeric_value":"55","unit":"mA","param_group":"absolute_max"},{"key":"ra","display_name":"Anode Resistance","value":"2500","numeric_value":"2500","unit":"Ω","param_group":"typical_operating"},{"key":"gm","display_name":"Transconductance","value":"5.7","numeric_value":"5.7","unit":"mA/V","param_group":"typical_operating"},{"key":"mu","display_name":"Amplification Factor (μ)","value":"14.3","numeric_value":"14.3","unit":"—","param_group":"typical_operating"}]}],"synced_at":"2026-04-07T12:50:13.518Z"}