{"type_number":"6AX6-G","canonical_url":"https://tubeofile.com/tubes/6AX6-G","manufacturer":"Tung-Sol","tube_type_key":"rectifier","tube_type_display_name":"Rectifier","base_name":"Octal","description":"Indirectly-heated full-wave high-vacuum rectifier designed by Tung-Sol for television damper service and conventional high-current power-supply applications. Low tube drop (21 V at 250 mA) and 250 mA DC output make it one of the heaviest-duty 6.3 V Octal rectifiers.","is_directly_heated":false,"completeness":"high","notes":["JEDEC base 7Q — medium-shell 7-pin Octal (one Octal pin is unused). Uses the standard Octal socket.","Primary design intent is TV damper service in horizontal-deflection circuits — hence the high peak-inverse rating in damper service (2000 V) vs normal rectifier service (1250 V), and the tolerance for the high pulse currents a damper diode sees.","Vhk is asymmetric: 450 V max heater-negative but only 100 V max heater-positive. Pay attention to phasing of the heater winding relative to B+ in conventional rectifier service.","Low Vdrop (21 V at the full 250 mA per plate) combined with 250 mA DC output makes this one of the most useful 6.3 V rectifiers for higher-current receivers and small amplifiers — roughly double the output of a 6X5 or 6AX5.","'50AX6G' variant is the same tube with a 50 V heater (series-string radios) — electrically equivalent once heater is satisfied but obviously not a drop-in for 6.3 V sockets."],"references":["https://frank.yueksel.org/sheets/127/6/6AX6G.pdf","https://frank.pocnet.net/sheets/127/6/6AX6G.pdf"],"source_urls":{"r_type":null,"tdsl":"https://tdsl.duncanamps.com/show.php?des=6AX6G","radiomuseum":"https://www.radiomuseum.org/tubes/tube_6ax6g.html"},"raw_equivalents":[],"equivalents":[],"similar":[{"type_number":"5U4GB","reason":"Similar DC output class (250 mA) but directly-heated 5 V/3 A filament and completely different pinout — not a drop-in","has_detail_page":false},{"type_number":"6AX5-GT","reason":"Same base family (Octal, 6.3 V, indirectly heated) and similar intent but lower ratings (125 mA vs 250 mA) and higher Vdrop (50 V vs 21 V); different pin layout — not a drop-in","has_detail_page":false}],"pins":[{"pin_number":"1","function":"No Connection","function_code":"nc","notes":null},{"pin_number":"2","function":"Heater","function_code":"h","notes":null},{"pin_number":"3","function":"Anode 1 (Plate 1)","function_code":"a1","notes":null},{"pin_number":"4","function":"Cathode","function_code":"k","notes":null},{"pin_number":"5","function":"Anode 2 (Plate 2)","function_code":"a2","notes":null},{"pin_number":"6","function":"Internal Shield","function_code":"is","notes":null},{"pin_number":"7","function":"Heater","function_code":"h","notes":null},{"pin_number":"8","function":"Cathode","function_code":"k","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":"2.5","numeric_value":"2.5","unit":"A","param_group":"heater"}],"sections":[{"section_number":1,"section_label":"Rectifier","tube_type_key":"rectifier","specs":[{"key":"Va_max","display_name":"Anode Voltage (max)","value":"350","numeric_value":"350","unit":"V","param_group":"absolute_max"},{"key":"Vhk_max","display_name":"Heater-to-Cathode Voltage (max)","value":"450","numeric_value":"450","unit":"V","param_group":"absolute_max"},{"key":"PIV","display_name":"Peak Inverse Voltage","value":"1250","numeric_value":"1250","unit":"V","param_group":"rectifier"},{"key":"Vdrop","display_name":"Voltage Drop (typical)","value":"21","numeric_value":"21","unit":"V","param_group":"rectifier"},{"key":"Idc_max","display_name":"Max DC Output Current (total, not per-anode)","value":"250","numeric_value":"250","unit":"mA","param_group":"rectifier"}]}],"synced_at":"2026-04-09T05:17:11.834Z"}