{"type_number":"6CL6","canonical_url":"https://tubeofile.com/tubes/6CL6","manufacturer":"RCA","tube_type_key":"power_pentode","tube_type_display_name":"Power Pentode","base_name":"Noval","description":"Power amplifier pentode designed for video output and AF power amplifier service. Noval base. High transconductance with controlled characteristics for linear amplification.","is_directly_heated":false,"completeness":"medium","notes":["GE Essential Characteristics: Pa_max 7.5 W, Va_max 300 V, Vs_max 150 V, Va(typ) 250 V, Vs(typ) 150 V, Vg=-3V, Ia=30mA, gm=7000, Rp=150000, Pout=2.8W.","6677 is the same tube under its RETMA registered number; 6197 is another alternate designation.","Sams substitution guide lists 2014 and 12G-K17 as substitutes.","Brans Vademecum lists 6677(/6CL6) as equivalent.","Used in television video output stages and as a driver in audio amplifiers."],"references":["https://frank.pocnet.net/sheets/127/6/6CL6.pdf","https://tdsl.duncanamps.com/show.php?des=6CL6"],"source_urls":{"r_type":null,"tdsl":"https://tdsl.duncanamps.com/show.php?des=6CL6","radiomuseum":"https://www.radiomuseum.org/tubes/tube_6cl6.html"},"raw_equivalents":["6677","6197"],"equivalents":[{"type_number":"6CK6","equivalence_type":"direct","notes":null},{"type_number":"EL803","equivalence_type":"direct","notes":null}],"similar":[{"type_number":"6AG7","reason":"Similar power pentode but Octal base — not pin-compatible","has_detail_page":true},{"type_number":"6CH6","reason":"Similar power pentode on Noval base but higher gm and different pinout — not a drop-in","has_detail_page":true}],"pins":[{"pin_number":"1","function":"Internal Connection","function_code":"ia","notes":null},{"pin_number":"2","function":"Anode","function_code":"a","notes":null},{"pin_number":"3","function":"No Connection","function_code":"nc","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":"Screen Grid (g2)","function_code":"g2","notes":null},{"pin_number":"7","function":"Suppressor Grid (g3)","function_code":"g3","notes":null},{"pin_number":"8","function":"Cathode","function_code":"k","notes":null},{"pin_number":"9","function":"Control Grid (g1)","function_code":"g1","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":"0.65","numeric_value":"0.65","unit":"A","param_group":"heater"}],"sections":[{"section_number":1,"section_label":"Power 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":"150","numeric_value":"150","unit":"V","param_group":"absolute_max"},{"key":"Pa_max","display_name":"Anode Dissipation (max)","value":"7.5","numeric_value":"7.5","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":"250","numeric_value":"250","unit":"V","param_group":"typical_operating"},{"key":"Vs","display_name":"Screen Voltage (typical)","value":"150","numeric_value":"150","unit":"V","param_group":"typical_operating"},{"key":"Vg","display_name":"Grid 1 Bias Voltage","value":"-3","numeric_value":"-3","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":"150000","numeric_value":"150000","unit":"Ω","param_group":"typical_operating"},{"key":"gm","display_name":"Transconductance","value":"7.0","numeric_value":"7","unit":"mA/V","param_group":"typical_operating"},{"key":"Pout","display_name":"Output Power","value":"2.8","numeric_value":"2.8","unit":"W","param_group":"output"}]}],"synced_at":"2026-04-07T12:20:35.702Z"}