{"type_number":"12AV5","canonical_url":"https://tubeofile.com/tubes/12AV5","manufacturer":null,"tube_type_key":"beam_tetrode","tube_type_display_name":"Beam Tetrode","base_name":"Octal","description":"Beam power tube with 12.6V/0.3A heater on Octal base. Designed as a horizontal deflection amplifier for television receivers. High peak plate voltage rating (5500V) and high peak cathode current capability suitable for sweep service.","is_directly_heated":false,"completeness":"medium","notes":["TDSL lists 17AV5GA, 25AV5GA, 25AV5GT, 6AV5GA, and 6AV5GT as different-filament-voltage variants.","The 12AV5GA is the later designation with improved glass envelope (GA suffix).","Designed specifically for TV horizontal deflection — not a general-purpose audio beam tetrode. The high peak anode voltage rating (5500V) is critical for flyback pulse handling.","Typical operating conditions as horizontal deflection amplifier: Va=135V (B+ supply), peak cathode current up to 210 mA.","Grid #1 is brought out to a top cap (pin TC) on most versions for reduced capacitance in sweep circuits."],"references":["https://frank.pocnet.net/sheets/127/1/12AV5GA.pdf","https://frank.pocnet.net/sheets/093/1/12AV5GA.pdf"],"source_urls":{"r_type":null,"tdsl":"https://tdsl.duncanamps.com/show.php?des=12AV5GA","radiomuseum":"https://www.radiomuseum.org/tubes/tube_12av5ga.html"},"raw_equivalents":["12AV5GA"],"equivalents":[],"similar":[{"type_number":"6AV5GA","reason":"Identical beam power tube except 6.3V/0.6A heater instead of 12.6V/0.3A — same plate and screen ratings","has_detail_page":false},{"type_number":"6BQ6","reason":"Similar horizontal deflection beam power tube on Octal base with 6.3V heater, comparable sweep service ratings","has_detail_page":false}],"pins":[{"pin_number":"1","function":"No Connection","function_code":"nc","notes":null},{"pin_number":"2","function":"Heater","function_code":"h","notes":null},{"pin_number":"3","function":"Plate","function_code":"a","notes":null},{"pin_number":"4","function":"Screen Grid","function_code":"g2","notes":null},{"pin_number":"5","function":"No Connection","function_code":"nc","notes":null},{"pin_number":"6","function":"No Connection","function_code":"nc","notes":null},{"pin_number":"7","function":"Heater","function_code":"h","notes":null},{"pin_number":"8","function":"Cathode","function_code":"k","notes":null},{"pin_number":"TC","function":"Control Grid","function_code":"g1","notes":null}],"specs":[{"key":"Vh","display_name":"Heater Voltage","value":"12.6","numeric_value":"12.6","unit":"V","param_group":"heater"},{"key":"Ah","display_name":"Heater Current","value":"0.3","numeric_value":"0.3","unit":"A","param_group":"heater"}],"sections":[{"section_number":1,"section_label":"Beam Power Tube","tube_type_key":"beam_tetrode","specs":[{"key":"Va_max","display_name":"Anode Voltage (max)","value":"175","numeric_value":"175","unit":"V","param_group":"absolute_max"},{"key":"Va_peak_max","display_name":"Peak Anode Voltage (max)","value":"5500","numeric_value":"5500","unit":"V","param_group":"absolute_max"},{"key":"Vs_max","display_name":"Screen Voltage (max)","value":"175","numeric_value":"175","unit":"V","param_group":"absolute_max"},{"key":"Pa_max","display_name":"Anode Dissipation (max)","value":"12","numeric_value":"12","unit":"W","param_group":"absolute_max"},{"key":"Ps_max","display_name":"Screen Dissipation (max)","value":"2.5","numeric_value":"2.5","unit":"W","param_group":"absolute_max"},{"key":"Ik_max","display_name":"Cathode Current (max)","value":"210","numeric_value":"210","unit":"mA","param_group":"absolute_max"},{"key":"Vhk_max","display_name":"Heater-to-Cathode Voltage (max)","value":"200","numeric_value":"200","unit":"V","param_group":"absolute_max"},{"key":"Va","display_name":"Anode Voltage (typical)","value":"135","numeric_value":"135","unit":"V","param_group":"typical_operating"},{"key":"Vs","display_name":"Screen Voltage (typical)","value":"135","numeric_value":"135","unit":"V","param_group":"typical_operating"},{"key":"Vg","display_name":"Grid 1 Bias Voltage","value":"-28","numeric_value":"-28","unit":"V","param_group":"typical_operating"},{"key":"mAa","display_name":"Anode Current","value":"68","numeric_value":"68","unit":"mA","param_group":"typical_operating"},{"key":"mAs","display_name":"Screen Current","value":"5.5","numeric_value":"5.5","unit":"mA","param_group":"typical_operating"},{"key":"gm","display_name":"Transconductance","value":"5.5","numeric_value":"5.5","unit":"mA/V","param_group":"typical_operating"}]}],"synced_at":"2026-04-07T12:04:04.006Z"}