{"type_number":"6CK6","canonical_url":"https://tubeofile.com/tubes/6CK6","manufacturer":null,"tube_type_key":"power_pentode","tube_type_display_name":"Power Pentode","base_name":"Noval","description":"Power amplifier pentode in Noval envelope. Designed for vertical deflection output and audio applications. High transconductance (10000 umhos) for its size.","is_directly_heated":false,"completeness":"medium","notes":["The 6CK6 is a miniature power pentode with high transconductance (10000 umhos) in a Noval base. Muiderkring lists EL83 as European equivalent.","GE rates max anode dissipation at 9W, max screen voltage 300V, max plate voltage 300V.","Typical operation at Va=250V, Vg2=250V, Vg=-5.5V: Ia=36mA, Ig2=5mA, gm=10000 umhos, Rp=130kΩ."],"references":["https://frank.pocnet.net/sheets/049/6/6CL6.pdf","https://tdsl.duncanamps.com/show.php?des=6CK6"],"source_urls":{"r_type":null,"tdsl":"https://tdsl.duncanamps.com/show.php?des=6CK6","radiomuseum":"https://www.radiomuseum.org/tubes/tube_6ck6.html"},"raw_equivalents":["EL83","6CL6","6GK6","CV2726","EL803"],"equivalents":[{"type_number":"6CL6","equivalence_type":"direct","notes":null},{"type_number":"6GK6","equivalence_type":"direct","notes":null},{"type_number":"EL803","equivalence_type":"direct","notes":null}],"similar":[{"type_number":"6CH6","reason":"Brans lists as equivalent — similar power pentode","has_detail_page":true},{"type_number":"7AD7","reason":"Brans lists as equivalent — Loctal base version, not pin-compatible","has_detail_page":true}],"pins":[{"pin_number":"1","function":"Grid 3 (Suppressor)","function_code":"g3","notes":null},{"pin_number":"2","function":"Grid 1 (Control Grid)","function_code":"g1","notes":null},{"pin_number":"3","function":"Cathode","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":"Grid 2 (Screen)","function_code":"g2","notes":null},{"pin_number":"7","function":"Anode","function_code":"a","notes":null},{"pin_number":"8","function":"No Connection","function_code":"nc","notes":null},{"pin_number":"9","function":"Internal shield","function_code":"shell","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":"0.71","numeric_value":"0.71","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":"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":"Vg2_max","display_name":"Screen Voltage (max)","value":"300","numeric_value":"300","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":"Vg","display_name":"Grid 1 Bias Voltage","value":"-5.5","numeric_value":"-5.5","unit":"V","param_group":"typical_operating"},{"key":"mAa","display_name":"Anode Current","value":"36","numeric_value":"36","unit":"mA","param_group":"typical_operating"},{"key":"Vg2","display_name":"Screen Voltage","value":"250","numeric_value":"250","unit":"V","param_group":"typical_operating"},{"key":"mAg2","display_name":"Screen Current","value":"5","numeric_value":"5","unit":"mA","param_group":"typical_operating"},{"key":"ra","display_name":"Anode Resistance","value":"130000","numeric_value":"130000","unit":"Ω","param_group":"typical_operating"},{"key":"gm","display_name":"Transconductance","value":"10","numeric_value":"10","unit":"mA/V","param_group":"typical_operating"}]}],"synced_at":"2026-04-07T19:02:57.971Z"}