{"type_number":"6754","canonical_url":"https://tubeofile.com/tubes/6754","manufacturer":"Bendix (Red Bank Division)","tube_type_key":"rectifier","tube_type_display_name":"Rectifier","base_name":"Noval","description":"Bendix Red Bank Type TE-36 reliable hard-glass miniature full-wave rectifier (generic type 412A). 9-pin Noval envelope with separate cathodes for each diode section, enabling both conventional full-wave and voltage-doubler topologies. Designed for aircraft, military, and industrial service where long life and vibration resistance are critical.","is_directly_heated":false,"completeness":"high","notes":["Generic type 412A — the Bendix 6754 is the industrial/hard-glass (Nonex) equivalent of the Western Electric 412A. Bendix guarantees 10,000 hour life expectancy under conservative operation.","Separate cathodes for each diode section (pins 5 and 6). This is the key architectural difference from conventional full-wave rectifiers like 6X4/EZ80 which share a single cathode — the 6754 can be used as either a full-wave centre-tap rectifier OR a voltage doubler by appropriate external wiring.","JEDEC base code 9ET uses the B9A (Noval) envelope but with a rectifier-specific pinout. NOT pin-compatible with 6203 (9CD) or EZ80 (9M) — each of these Noval rectifiers uses a different pin arrangement.","Hard-glass (Nonex) bulb and tungsten-nonex stem seal permit bulb temperatures up to 300 °C (vs ~175 °C for soft-glass tubes). Nickel pins are gold-plated for low contact resistance.","Heater-cathode voltage rating 500 V (design max); design test condition Ehk ±500 V.","Ratings derate with operation: conservative 85 mA DC output (0-20,000 ft, max life), typical 90 mA (60,000 ft, high life), maximum 100 mA (80,000 ft, medium life).","Peak plate current per plate 300 mA (design centre) / 330 mA (absolute max); peak surge 1.1 A.","Vdrop ≈ 12 V at 50 mA per plate, read from the Average Plate Characteristics curve (page 3 of the Bendix datasheet) — at the typical 100 mA total DC output with choke input (50 mA per plate conducting half-cycle). At 100 mA per plate Vdrop rises to ~19 V.","Cathode heating time 45 seconds — allow warm-up before applying plate voltage.","Each tube undergoes a 45-hour run-in under overload/vibration/shock prior to test to eliminate infant-mortality failures."],"references":["https://frank.pocnet.net/sheets/131/6/6754.pdf","http://www.the-planet.org/gkaufman/pdf/WE412A.pdf"],"source_urls":{"r_type":null,"tdsl":"https://tdsl.duncanamps.com/show.php?des=6754","radiomuseum":"https://www.radiomuseum.org/tubes/tube_6754.html"},"raw_equivalents":["412A","TE-36"],"equivalents":[],"similar":[{"type_number":"6203","reason":"Another Noval 6.3V full-wave rectifier, but JEDEC 9CD pinout with single shared cathode — not pin-compatible with 9ET","has_detail_page":true},{"type_number":"6X4","reason":"Similar current class (70 mA vs 90-100 mA), but B7G 7-pin base and single common cathode — cannot be used as voltage doubler","has_detail_page":true},{"type_number":"EZ80","reason":"Noval 6.3V/0.6A full-wave rectifier, but JEDEC 9M pinout with single shared cathode — different pin arrangement and no voltage-doubler capability","has_detail_page":true}],"pins":[{"pin_number":"1","function":"Plate 2 (Anode 2)","function_code":"a2","notes":null},{"pin_number":"2","function":"No Connection","function_code":"nc","notes":null},{"pin_number":"3","function":"Heater","function_code":"h","notes":null},{"pin_number":"4","function":"No Connection","function_code":"nc","notes":null},{"pin_number":"5","function":"Cathode 2","function_code":"k2","notes":null},{"pin_number":"6","function":"Cathode 1","function_code":"k1","notes":null},{"pin_number":"7","function":"No Connection","function_code":"nc","notes":null},{"pin_number":"8","function":"Heater","function_code":"h","notes":null},{"pin_number":"9","function":"Plate 1 (Anode 1)","function_code":"a1","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":"1.0","numeric_value":"1","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":"450","numeric_value":"450","unit":"V","param_group":"absolute_max"},{"key":"Vhk_max","display_name":"Heater-to-Cathode Voltage (max)","value":"500","numeric_value":"500","unit":"V","param_group":"absolute_max"},{"key":"PIV","display_name":"Peak Inverse Voltage","value":"1450","numeric_value":"1450","unit":"V","param_group":"rectifier"},{"key":"Vdrop","display_name":"Voltage Drop (typical)","value":"12","numeric_value":"12","unit":"V","param_group":"rectifier"},{"key":"C_max","display_name":"Max C-input Filter Capacitor","value":"4","numeric_value":"4","unit":"µF","param_group":"rectifier"},{"key":"Ia_peak","display_name":"Peak Anode Current (surge)","value":"330","numeric_value":"330","unit":"mA","param_group":"rectifier"},{"key":"Idc_max","display_name":"Max DC Output Current (total, not per-anode)","value":"100","numeric_value":"100","unit":"mA","param_group":"rectifier"}]}],"synced_at":"2026-04-09T05:16:57.413Z"}