[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-563063-105":59,"doc-detail-563063-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","12bh7-a-medium-mu-twin-triode-9-pin-miniature-type-medium-mu-twin-triode-tube-datasheet","12BH7-A - MEDIUM-MU TWIN TRIODE - 9-PIN MINIATURE TYPE - Medium-Mu Twin Triode Tube Datasheet","","Tube 12BH7-A medium-mu twin triode, 9-pin miniature type, intended for heater-string arrangements with unipotential cathodes. Provides electrical general data including heater voltages (12.6 or 6.3 ac/dc), heater current (0.6/0.3 A), typical warm-up guidance, and approximate interelectrode capacitances between grid, plate, cathode, and heater for two units. Includes mechanical mounting position, dimensions, and Noval 9-pin small-button base pin mapping. Further lists amplifier class A1 designation, maximum ratings, design-center operating values, and tentative data for horizontal and vertical deflection oscillator/amplifier applications (525-line, 30-frame).",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":30,"@type":76,"position":81},"https://docshare.wps.com/document/technology/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/12bh7-a-medium-mu-twin-triode-9-pin-miniature-type-medium-mu-twin-triode-tube-datasheet/563063/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/12bh7-a-medium-mu-twin-triode-9-pin-miniature-type-medium-mu-twin-triode-tube-datasheet/563063.png","ImageObject",300,407,{"name":92,"@type":93},"MrHarris58","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-15","2026-10-12",true,{"@type":102,"interactionType":103,"userInteractionCount":14},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What heater voltage options does the 12BH7-A datasheet specify?","Question",{"text":112,"@type":113},"It specifies heater voltages of 12.6 V and 6.3 V (ac or dc), with corresponding heater current values of 0.6 A and 0.3 A.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"What are the listed maximum rating values for plate voltage and grid pulse conditions?",{"text":117,"@type":113},"The tentative and section data include maximum DC plate voltage values (e.g., 300 max. volts and 450 max. volts depending on section) and peak grid pulse voltages (e.g., 600 max. volts for horizontal deflection oscillator and 400 max. volts for vertical deflection oscillator).",{"name":119,"@type":110,"acceptedAnswer":120},"How is the 12BH7-A used in deflection circuits according to the datasheet?",{"text":121,"@type":113},"It provides separate rating and design-center guidance for a horizontal deflection oscillator and vertical deflection oscillator/amplifier for operation in a 525-line, 30-frame system, including allowable pulse duration guidance and grid-circuit resistance limits.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},563063,1792060256,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":29,"category_name":30,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":14,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":19,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":143,"read_time":52},687212988360,"https://ap-avatar.wpscdn.com/davatar_276721f389ce27ea32af1340a28f341c","12BH7-A  \nMEDIUM-MU TWIN TRIODE  \n9-PIN MINIATURE TYPE  \nIntended for use in equipment hauin乌  \nseries heater-string arrangement  \n\n| GENERAL DATA  \u003Cbr>Electrical:  \u003Cbr>Heater,for Unipotential Cathodes:  \u003Cbr>Heater arrangement  \u003Cbr>Parallel  \u003Cbr>Series  \u003Cbr>Voltage .........  12.6  \u003Cbr>6.3 ac or dc volts  \u003Cbr>0.6 ......amp  \u003Cbr>Current .·..···..   0.3  \u003Cbr>11 .··...sec  \u003Cbr>Warm-up time(Average)..  一  \u003Cbr>For definition of heater warm-up time and method of determining  \u003Cbr>it,see sheet HEATER WARM-UP TIME MEASUREMENT at front of  \u003Cbr>this Section.  \u003Cbr>Di rect Interelectrode Capacitances(Approx.):0  \u003Cbr>Unit No.1 Unit No.2  \u003Cbr>4f  \u003Cbr>Grid to plate...·..  2.6  \u003Cbr>2.6  \u003Cbr>Grid to cathode  \u003Cbr>4uf  \u003Cbr>3.2  \u003Cbr>and heater.·····.  3.2  \u003Cbr>Plate to cathode  \u003Cbr>0.4  \u003Cbr>uf  \u003Cbr>and heater..····.   0.5  \u003Cbr>Plate of unit No.1 to  \u003Cbr>f  \u003Cbr>plate of unit No.2 .....0.8  \u003Cbr>Mechanical:  \u003Cbr>Mounting Position.··..··....·......·.Any  \u003Cbr>Maximum Overall Length.···············2-5/8\"  \u003Cbr>Maximum Seated Length .··.·..···.····.  2-3/8\"  \u003Cbr>Length,Base Seat to Bulb Top(Excluding tip)...2\"±3132\"  \u003Cbr>Maximum Diameter....................718\"  \u003Cbr>Bulb.........................T-6-1/2  \u003Cbr>Base.      ..Sma11-Button Noval 9-Pin (JETEC No.E9-1)  \u003Cbr>Basing Designation for BOTTOM VIEW ....·..·..  9A  \u003Cbr>Pin 6-Plate of  \u003Cbr>Pin 1-Plate of  \u003Cbr>Unit No.1  \u003Cbr>Unit No.2  \u003Cbr>⑤  \u003Cbr>Pin 7-Grid of  \u003Cbr>Pin 2-Grid of  \u003Cbr>Unit No.2  \u003Cbr>Unit No.1  \u003Cbr>⑦  \u003Cbr>③  \u003Cbr>Pin 8-Cathode of  \u003Cbr>Pin 3-Cathode of  \u003Cbr>②  \u003Cbr>Unit No.1  \u003Cbr>Unit No.2  \u003Cbr>Pin 9-Heater  \u003Cbr>Pins 4&9-Heater of  \u003Cbr>◎  \u003Cbr>Mid-Tap  \u003Cbr>Unit No.2  \u003Cbr>Pins 5&9-Heater of  \u003Cbr>Unit No.1  \u003Cbr>AMPLIFIER -Class A₁  \u003Cbr>Values are for Each Unit  \u003Cbr>Maximum Ratings,Design-Center Values:  \u003Cbr>PLATE VOLTAGE .··.....·.·.·..   300 max.  volts  \u003Cbr>o without externa1 shield.   |\n| --- |\n\nTENTATIVE DATA 1  \nMAR.1,1955  \nTURE DIVISION  \nI2BH7-  \n12BH7一A  \nMEDIUM-MU TWIN TRIODE  \nGRID VOLTAGE:  \n50 max. volts  \nNegative bias value…………………………………………………  \nPositive bias value…………………………………………………………  \n0 max. volts  \n20 max.  \nCATHODE CURRENT…………………………………………………………  \nma  \n# 3.5 max. watts\n\nPLATE DISSIPATION ..  \n·……………………·  \nPEAK HEATER-CATHODE VOLTAGE:  \nHeater negative with respect to cathode. 200 max. volts  \nHeater positive with respect to cathode . 2004max. volts  \nCharacteristics:  \nvolts  \nPlate Voltage ………………………………………………………………………250  \nGrid Voltage…………………………………………………………………………………10.5  \nvolts  \nAmplification Factor………………………………………………………………16.5  \nohms  \nPlate Resistance(Approx.)………………………………………………5300  \nTransconductance……………………………………………………………………3100  \nμmhos  \nPlate Current……………………………………………………………………11.5  \nma  \nPlate Current for grid  \nma  \nvoltage of-14 volts……………………………………………4  \nGrid Voltage(Approx.) for  \nvolts  \nplate current of 50 μamp ……………………………………………23  \nMaximum Circuit Values:  \nGrid-Circuit Resistance:  \nFor fixed-bias operation………………………………………0.25max.megohm  \nFor cathode-bias operation……………………………………1.0max.megohm  \nHORIZONTAL DEFLECTION OSCILLATOR  \nValues are for Each Unit  \nMax imum Ratings,Design-Center Values:  \nFor operation in a 525-line,30-frame system  \n450 max. volts  \nDC PLATE VOLTAGE…………………………………:····.  \nPEAK NEGATIVE-PULSE GRID VOLTAGE……………………600max.volts  \nCATHODE CURRENT:  \nPeak... …………………………………………………………………………………………  \n300 max. ma  \nAveraae. . ... . ... …………………………………………  \n20 max. ma  \nPLATE DISSIPATION ..  \n3.5 max. watts  \nPEAK HEATER-CATHODE VOLTAGE:  \nHeater negative with respect to cathode . 200 max. volts  \n2004max. volts  \nHeater positive with respect to cathode.  \nMaximum Circuit Values:  \nGrid-Circuit Resistance:  \nFor fixed-bias, grid-resistor bias, or  \n# 2.2 max. megohms\n\ncathode-bias operation…………………………………………  \nThis rating is applicable where the duration of the yoltage pulse does|  \nnot exceed 15 per cent of one horizontal scanning cycle.in a 525-1ine,  \n30-frame system,15 per cent of one horizontal scanning cycle is 10 mi-  \ncroseconds.  \n,口： see next page.  \nMAR.1","cbCainqx9gnCHNXB","https://ap.wps.com/l/cbCainqx9gnCHNXB","pdf",179568,"English","# GENERAL DATA\n## Electrical\n## Mechanical\n# AMPLIFIER - Class A1\n# TENTATIVE DATA 1\n## Maximum ratings and design-center values\n## Grid and cathode operating conditions\n# HORIZONTAL DEFLECTION OSCILLATOR\n# VERTICAL DEFLECTION OSCILLATOR\n# VERTICAL DEFLECTION AMPLIFIER","[{\"question\":\"What heater voltage options does the 12BH7-A datasheet specify?\",\"answer\":\"It specifies heater voltages of 12.6 V and 6.3 V (ac or dc), with corresponding heater current values of 0.6 A and 0.3 A.\"},{\"question\":\"What are the listed maximum rating values for plate voltage and grid pulse conditions?\",\"answer\":\"The tentative and section data include maximum DC plate voltage values (e.g., 300 max. volts and 450 max. volts depending on section) and peak grid pulse voltages (e.g., 600 max. volts for horizontal deflection oscillator and 400 max. volts for vertical deflection oscillator).\"},{\"question\":\"How is the 12BH7-A used in deflection circuits according to the datasheet?\",\"answer\":\"It provides separate rating and design-center guidance for a horizontal deflection oscillator and vertical deflection oscillator/amplifier for operation in a 525-line, 30-frame system, including allowable pulse duration guidance and grid-circuit resistance limits.\"}]","12BH7-A - MEDIUM-MU TWIN TRIODE - 9-PIN MINIATURE TYPE - Medium-Mu Twin Triode Tube Datasheet | PDF",1791810445]