{"type_number":"8GK6","canonical_url":"https://tubeofile.com/tubes/8GK6","manufacturer":null,"tube_type_key":"power_pentode","tube_type_display_name":"Power Pentode","base_name":"Compactron","description":"Beam power pentode designed for audio output stages in series-heater television and radio receivers. 8.4 V heater for series-string operation. Compact Compactron (12-pin) envelope. Functionally similar to the EL84/6BQ5 family but with different heater voltage and base.","is_directly_heated":false,"completeness":"medium","notes":["8.4 V / 0.45 A series heater for series-string operation in AC/DC TV receivers.","Brans Vademecum lists extensive equivalents in the EL84/6BQ5 family, but most are NOT pin-compatible due to different bases.","16GK6 and 29GK6 are heater voltage variants (16.8 V and 29.4 V respectively) with the same Compactron base."],"references":["https://tdsl.duncanamps.com/show.php?des=8GK6","https://www.radiomuseum.org/tubes/?tube=8GK6"],"source_urls":{"r_type":null,"tdsl":"https://tdsl.duncanamps.com/show.php?des=8GK6","radiomuseum":null},"raw_equivalents":["16GK6","29GK6"],"equivalents":[{"type_number":"6GK6","equivalence_type":"direct","notes":null}],"similar":[{"type_number":"EL84","reason":"Similar power pentode but Noval base and 6.3 V heater — not pin-compatible","has_detail_page":true}],"pins":[{"pin_number":"1","function":"No Connection","function_code":"nc","notes":null},{"pin_number":"2","function":"Cathode","function_code":"k","notes":null},{"pin_number":"3","function":"Control Grid","function_code":"g1","notes":null},{"pin_number":"4","function":"No Connection","function_code":"nc","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":"No Connection","function_code":"nc","notes":null},{"pin_number":"9","function":"Screen Grid","function_code":"g2","notes":null},{"pin_number":"10","function":"Internal Shield","function_code":"ia","notes":null},{"pin_number":"11","function":"No Connection","function_code":"nc","notes":null},{"pin_number":"12","function":"No Connection","function_code":"nc","notes":null}],"specs":[{"key":"Vh","display_name":"Heater Voltage","value":"8.4","numeric_value":"8.4","unit":"V","param_group":"heater"},{"key":"Ah","display_name":"Heater Current","value":"0.45","numeric_value":"0.45","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":"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":"Va","display_name":"Anode Voltage (typical)","value":"200","numeric_value":"200","unit":"V","param_group":"typical_operating"},{"key":"Vs","display_name":"Screen Voltage (typical)","value":"200","numeric_value":"200","unit":"V","param_group":"typical_operating"},{"key":"Vg","display_name":"Grid 1 Bias Voltage","value":"-7.3","numeric_value":"-7.3","unit":"V","param_group":"typical_operating"},{"key":"mAa","display_name":"Anode Current","value":"36","numeric_value":"36","unit":"mA","param_group":"typical_operating"},{"key":"ra","display_name":"Anode Resistance","value":"38000","numeric_value":"38000","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":"4.6","numeric_value":"4.6","unit":"W","param_group":"output"}]}],"synced_at":"2026-04-07T12:35:02.002Z"}