{"type_number":"EZ11","canonical_url":"https://tubeofile.com/tubes/EZ11","manufacturer":"Philips","tube_type_key":"rectifier","tube_type_display_name":"Rectifier","base_name":"Rimlock","description":"Full-wave vacuum rectifier (double anode) for power supply use, on a Rimlock (B8A) base. Part of the Philips 'Rimlock' series of tubes from the late 1940s. Indirectly heated, 6.3V heater.","is_directly_heated":false,"completeness":"high","notes":["The EZ11 uses the Rimlock (B8A) base, which was Philips' standard before the transition to Noval. The Rimlock base has 8 pins with a metal locating ring.","Brans Vademecum lists the EZ11 in table IId alongside AZ31, EZ1, EZ40, EZ41, 5Y3G/GT, 5Y4G/GT — these share similar function but differ in base and/or heater voltage.","The 6V4 is the American designation. CV number not assigned for this type.","Sams substitution guide lists 6V4 as the substitute.","Vdrop ≈ 17V estimated from the closely related EZ40 (Vh=6.3V, Ah=0.6A, Idc_max=90mA, Vdrop=17V per datasheet) which is electrically near-identical. The Telefunken EZ11 Funkwerk Erfurt datasheet (frank.pocnet.net /076/e/EZ11.pdf) describes a different car-radio variant with 0.29A heater and 60mA rating — it is NOT the Philips mains EZ11 this entry represents. For the authoritative Philips EZ11 Vdrop, consult the Philips Mullard datasheet directly if a precise value is needed."],"references":["https://tdsl.duncanamps.com/show.php?des=EZ11","https://frank.pocnet.net/sheets/076/e/EZ11.pdf","https://frank.pocnet.net/sheets/082/e/EZ11.pdf"],"source_urls":{"r_type":null,"tdsl":"https://tdsl.duncanamps.com/show.php?des=EZ11","radiomuseum":"https://www.radiomuseum.org/tubes/tube_ez11.html"},"raw_equivalents":["6V4"],"equivalents":[],"similar":[{"type_number":"AZ31","reason":"Full-wave rectifier on Octal base but 4V heater — different heater and base","has_detail_page":true},{"type_number":"EZ40","reason":"Full-wave rectifier on Rimlock base — successor type, similar ratings but different internal design","has_detail_page":true},{"type_number":"EZ80","reason":"Full-wave rectifier with same heater voltage but Noval base — not pin-compatible","has_detail_page":true}],"pins":[{"pin_number":"1","function":"Anode 1","function_code":"a1","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":"Cathode","function_code":"k","notes":null},{"pin_number":"5","function":"No Connection","function_code":"nc","notes":null},{"pin_number":"6","function":"Anode 2","function_code":"a2","notes":null},{"pin_number":"7","function":"No Connection","function_code":"nc","notes":null},{"pin_number":"8","function":"Heater","function_code":"h","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":"0.6","numeric_value":"0.6","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":"PIV","display_name":"Peak Inverse Voltage","value":"1000","numeric_value":"1000","unit":"V","param_group":"rectifier"},{"key":"Vdrop","display_name":"Voltage Drop (typical)","value":"17","numeric_value":"17","unit":"V","param_group":"rectifier"},{"key":"Idc_max","display_name":"Max DC Output Current (total, not per-anode)","value":"90","numeric_value":"90","unit":"mA","param_group":"rectifier"}]}],"synced_at":"2026-04-09T05:18:35.954Z"}