{"type_number":"284","canonical_url":"https://tubeofile.com/tubes/284","manufacturer":"Western Electric","tube_type_key":"rectifier","tube_type_display_name":"Rectifier","base_name":"UY5","description":"Western Electric high-vacuum full-wave rectifier with directly heated cathode. Uses a UY 5-pin base. Designed for power supply service in telephone and radio equipment. Contains two diode sections sharing a common filament.","is_directly_heated":true,"completeness":"low","notes":["DHT rectifier: the filament serves as the cathode; no heater-cathode isolation.","UY 5-pin base — not to be confused with the UX 4-pin base used on the 274A and similar WE rectifiers.","Very limited datasheet information is available; CV2606 is listed as an identical substitute by TDSL.","Rectifier section intentionally left empty: no published datasheet states Va_max, Ia_max, Vdrop, or PIV for type 284. Radiomuseum classifies it only as a 'common USA high-vacuum rectifier' with 6V/0.5A filament on a UY5 base, introduced pre-1928. Values should not be invented — re-populate only if a primary datasheet (RCA, WE, or CV2606 Admiralty pattern) is located."],"references":["https://tdsl.duncanamps.com/show.php?des=284","https://www.radiomuseum.org/tubes/?tube=284"],"source_urls":{"r_type":null,"tdsl":"https://tdsl.duncanamps.com/show.php?des=284","radiomuseum":"https://www.radiomuseum.org/tubes/tube_284.html"},"raw_equivalents":["CV2606"],"equivalents":[],"similar":[],"pins":[{"pin_number":"1","function":"Anode 1 (Plate 1)","function_code":"a1","notes":null},{"pin_number":"2","function":"No Connection","function_code":"nc","notes":null},{"pin_number":"3","function":"Filament","function_code":"h","notes":null},{"pin_number":"4","function":"Anode 2 (Plate 2)","function_code":"a2","notes":null},{"pin_number":"5","function":"Filament","function_code":"h","notes":null}],"specs":[{"key":"Vh","display_name":"Heater Voltage","value":"6","numeric_value":"6","unit":"V","param_group":"heater"},{"key":"Ah","display_name":"Heater Current","value":"0.5","numeric_value":"0.5","unit":"A","param_group":"heater"}],"sections":[{"section_number":1,"section_label":"Rectifier","tube_type_key":"rectifier","specs":[]}],"synced_at":"2026-04-08T07:50:11.844Z"}