{"type_number":"6V3","canonical_url":"https://tubeofile.com/tubes/6V3","manufacturer":"Tung-Sol","tube_type_key":"rectifier","tube_type_display_name":"Rectifier","base_name":"Noval","description":"Half-wave high vacuum rectifier with coated unipotential cathode, designed for use as a damping diode in horizontal-deflection circuits of television receivers. May also be used as a half-wave rectifier. Miniature 9-pin construction.","is_directly_heated":false,"completeness":"high","notes":["Base is Miniature Button 9-Pin (JEDEC 9BD). Brans Vademecum table IIf lists 6V3(A) with equivalent PY71.","MIL-HDBK-213A classifies as 'Receiving diode, damper' and lists 6V3A as the other number for 6V3.","GE Essential Characteristics lists base as 9BD for both 6V3 and 6V3-A.","Datasheet is marked 'TENTATIVE DATA' and covers the 6V3A. The 6V3A is an improved version of the 6V3.","DC component of heater-cathode voltage must not exceed 750 V with heater negative. This is a high Vhk rating suitable for horizontal-deflection damper service where the cathode swings to high B+ levels.","The tube should be adequately ventilated as with other power-handling tubes.","Sams Substitution Handbook lists EY81F as a substitute for 6V3.","Damper service ratings: PIV 6000 V, peak plate current 600 mA, max DC output current 135 mA. Half-wave rectifier ratings: max AC plate voltage 350 V RMS, max DC output current 125 mA.","Filter input capacitor limited to 20 uF in half-wave rectifier service. Minimum total effective plate supply voltage is 145 V."],"references":["https://frank.pocnet.net/sheets/127/6/6V3A.pdf"],"source_urls":{"r_type":null,"tdsl":"https://tdsl.duncanamps.com/show.php?des=6V3","radiomuseum":"https://www.radiomuseum.org/tubes/tube_6v3.html"},"raw_equivalents":["6V3A"],"equivalents":[],"similar":[{"type_number":"6AX4GT","reason":"Brans cross-lists in damper group (table IIf via 6V3P). Similar damper function but Octal base vs Noval — not pin-compatible.","has_detail_page":false}],"pins":[{"pin_number":"1","function":"No Connection","function_code":"nc","notes":null},{"pin_number":"2","function":"Plate","function_code":"a","notes":null},{"pin_number":"3","function":"Internal Connection","function_code":"ic","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":"No Connection","function_code":"nc","notes":null},{"pin_number":"7","function":"Cathode","function_code":"k","notes":null},{"pin_number":"8","function":"No Connection","function_code":"nc","notes":null},{"pin_number":"9","function":"Plate","function_code":"a","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":"1.75","numeric_value":"1.75","unit":"A","param_group":"heater"}],"sections":[{"section_number":1,"section_label":"Damper Diode / Half-Wave Rectifier","tube_type_key":"rectifier","specs":[{"key":"Vhk_max","display_name":"Heater-to-Cathode Voltage (max)","value":"750","numeric_value":"750","unit":"V","param_group":"absolute_max"},{"key":"PIV","display_name":"Peak Inverse Voltage","value":"6000","numeric_value":"6000","unit":"V","param_group":"rectifier"},{"key":"Vac_max","display_name":"AC Plate Voltage (RMS, max)","value":"350","numeric_value":"350","unit":"V","param_group":"rectifier"},{"key":"Vdrop","display_name":"Voltage Drop (typical)","value":"14","numeric_value":"14","unit":"V","param_group":"rectifier"},{"key":"C_max","display_name":"Max C-input Filter Capacitor","value":"20","numeric_value":"20","unit":"µF","param_group":"rectifier"},{"key":"Ia_peak","display_name":"Peak Anode Current (surge)","value":"600","numeric_value":"600","unit":"mA","param_group":"rectifier"},{"key":"Idc_max","display_name":"Max DC Output Current (total, not per-anode)","value":"125","numeric_value":"125","unit":"mA","param_group":"rectifier"},{"key":"Idc_max","display_name":"Max DC Output Current (total, not per-anode)","value":"135","numeric_value":"135","unit":"mA","param_group":"rectifier"},{"key":"Rs_min","display_name":"Min Series Resistance (C-input)","value":"145","numeric_value":"145","unit":"Ω","param_group":"rectifier"},{"key":null,"display_name":"Heater to Cathode Capacitance","value":"1.5","numeric_value":"1.5","unit":"pF","param_group":null}]}],"synced_at":"2026-04-08T07:53:13.523Z"}