{"type_number":"RGN2304","canonical_url":"https://tubeofile.com/tubes/RGN2304","manufacturer":"Telefunken","tube_type_key":"rectifier","tube_type_display_name":"Rectifier","base_name":"B4","description":"Full-wave vacuum rectifier with directly-heated cathode. Telefunken design from the 1930s. 4-pin base. The designation follows the Telefunken naming system: R = rectifier, G = indirectly heated (though actually directly heated), N = Netzanschluss (mains), 2304 = ratings code. Used in early German radio receiver power supplies.","is_directly_heated":true,"completeness":"medium","notes":["Early Telefunken full-wave rectifier from the 1930s.","Directly-heated cathode despite the 'G' in the designation.","The RGN naming convention: R=Gleichrichterroehre (rectifier), G=indirekte Heizung, N=Netzanschluss.","4 V filament for European mains receiver transformer use.","Largely superseded by the AZ series (AZ1, AZ11, AZ12)."],"references":["https://tdsl.duncanamps.com/show.php?des=RGN2304","https://www.radiomuseum.org/tubes/?tube=RGN2304"],"source_urls":{"r_type":null,"tdsl":"https://tdsl.duncanamps.com/show.php?des=RGN2304","radiomuseum":"https://www.radiomuseum.org/tubes/tube_rgn2304.html"},"raw_equivalents":[],"equivalents":[],"similar":[{"type_number":"80","reason":"American full-wave rectifier with similar concept — different base and ratings","has_detail_page":true},{"type_number":"AZ11","reason":"Later Philips replacement rectifier — different base","has_detail_page":true},{"type_number":"RGN1064","reason":"Related Telefunken rectifier — different ratings","has_detail_page":true}],"pins":[{"pin_number":"1","function":"Anode 1","function_code":"a1","notes":null},{"pin_number":"2","function":"Filament","function_code":"f","notes":null},{"pin_number":"3","function":"Filament","function_code":"f","notes":null},{"pin_number":"4","function":"Anode 2","function_code":"a2","notes":null}],"specs":[{"key":"Vh","display_name":"Heater Voltage","value":"4","numeric_value":"4","unit":"V","param_group":"heater"},{"key":"Ah","display_name":"Heater Current","value":"1.1","numeric_value":"1.1","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":"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":"Idc_max","display_name":"Max DC Output Current (total, not per-anode)","value":"60","numeric_value":"60","unit":"mA","param_group":"rectifier"}]}],"synced_at":"2026-04-08T07:56:38.574Z"}