[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-1-en-105":3,"doc-seo-240746-105":53,"doc-detail-240746-en":126},{"code":4,"msg":5,"data":6},0,"success",[7,14,19,24,29,34,39,44,49],{"id":8,"doc_module":9,"doc_module_name":10,"category_name":11,"show_sort_weight":12,"slug":13},11,1,"Template","Presentations",90,"presentations",{"id":15,"doc_module":9,"doc_module_name":10,"category_name":16,"show_sort_weight":17,"slug":18},12,"Resumes",80,"resumes",{"id":20,"doc_module":9,"doc_module_name":10,"category_name":21,"show_sort_weight":22,"slug":23},14,"Invoices",70,"invoices",{"id":25,"doc_module":9,"doc_module_name":10,"category_name":26,"show_sort_weight":27,"slug":28},15,"Posters",60,"posters",{"id":30,"doc_module":9,"doc_module_name":10,"category_name":31,"show_sort_weight":32,"slug":33},16,"Social Media",50,"social-media",{"id":35,"doc_module":9,"doc_module_name":10,"category_name":36,"show_sort_weight":37,"slug":38},17,"Forms",40,"forms",{"id":40,"doc_module":9,"doc_module_name":10,"category_name":41,"show_sort_weight":42,"slug":43},18,"Letters",30,"letters",{"id":45,"doc_module":9,"doc_module_name":10,"category_name":46,"show_sort_weight":47,"slug":48},21,"Paper Templates",5,"papers-templates",{"id":50,"doc_module":9,"doc_module_name":10,"category_name":51,"show_sort_weight":4,"slug":52},158,"General","general-158",{"code":4,"msg":54,"data":55},"ok",{"site_id":56,"language":57,"slug":58,"title":59,"keywords":60,"description":61,"schema_data":62,"social_meta":119,"head_meta":121,"extra_data":123,"updated_unix":125},105,"en","quartz-clock-voltages-and-waveforms-measurement-data-and-waveform-notes","Quartz Clock - Voltages and Waveforms - Measurement Data and Waveform Notes","","Measurement data and waveform observations for a vacuum tube quartz clock are compiled, including voltmeter readings taken with a digital multimeter for AC true-RMS values and scope measurements using a Tektronix 2014. The document explains limits of DMM accuracy with large nonsinusoidal AC signals and details expected measurement error relative to peak-to-peak swing, as well as requirements for capturing valid DC averages across at least two waveform cycles. Tables list tube pin average VDC and peak-to-peak and VAC values, followed by annotated waveform images and scope notes.",{"@graph":63,"@context":118},[64,80,101],{"@type":65,"itemListElement":66},"BreadcrumbList",[67,71,74,77],{"item":68,"name":69,"@type":70,"position":9},"https://docshare.wps.com","Home","ListItem",{"item":72,"name":10,"@type":70,"position":73},"https://docshare.wps.com/template/",2,{"item":75,"name":51,"@type":70,"position":76},"https://docshare.wps.com/template/general/",3,{"item":78,"name":59,"@type":70,"position":79},"https://docshare.wps.com/template/quartz-clock-voltages-and-waveforms-measurement-data-and-waveform-notes/240746/",4,{"url":78,"name":59,"@type":81,"image":82,"author":87,"headline":59,"publisher":90,"fileFormat":93,"inLanguage":57,"description":61,"dateModified":94,"datePublished":95,"encodingFormat":93,"isAccessibleForFree":96,"interactionStatistic":97},"DigitalDocument",{"url":83,"@type":84,"width":85,"height":86},"https://docshare.wps.com/thumbnails/quartz-clock-voltages-and-waveforms-measurement-data-and-waveform-notes/240746.png","ImageObject",442,249,{"name":88,"@type":89},"Ben Jamin","Person",{"url":68,"name":91,"@type":92},"DocShare","Organization","application/pdf","2026-09-21","2026-09-11",true,{"@type":98,"interactionType":99,"userInteractionCount":9},"InteractionCounter",{"@type":100},"ViewAction",{"@type":102,"mainEntity":103},"FAQPage",[104,110,114],{"name":105,"@type":106,"acceptedAnswer":107},"How were AC and DC voltages measured in these results?","Question",{"text":108,"@type":109},"AC values were taken with a digital multimeter and are true RMS. Tube-related voltage waveforms were measured with a Tektronix 2014 digital scope to capture nonsinusoidal peak-to-peak behavior and to derive DC averages under defined horizontal-span conditions.","Answer",{"name":111,"@type":106,"acceptedAnswer":112},"Why is a DMM unreliable for the tube circuits in this document?",{"text":113,"@type":109},"The circuits contain large AC signals with nonsinusoidal waveforms, so average DC readings and AC measurements from a typical DMM can be inaccurate. Peak-to-peak values are needed, and the waveform shape prevents reliable DMM-based AC characterization.",{"name":115,"@type":106,"acceptedAnswer":116},"What guidance is given for obtaining a valid DC average from the scope?",{"text":117,"@type":109},"To produce a valid DC average, the horizontal span must include at least two cycles of the waveform. Entries marked as \"~0.0\" indicate readings were insignificant relative to the vertical span.","https://schema.org",{"og:url":78,"og:type":120,"og:title":59,"og:site_name":91,"og:description":61},"article",{"robots":122,"canonical":78},"index,follow",{"doc_id":124,"site_id":56},240746,1789165234,{"code":4,"msg":5,"data":127},{"doc_id":124,"user_id":128,"nickname":88,"user_avatar":129,"doc_module":9,"category_id":50,"category_name":51,"doc_title":59,"doc_description":61,"doc_content":130,"file_id":131,"file_url":132,"file_type":133,"file_size":134,"view_count":9,"is_deleted":4,"is_public":9,"is_downloadable":9,"audit_status":9,"page_count":76,"language":135,"language_code":57,"site_id":56,"html_lang":57,"table_of_contents":136,"faqs":137,"seo_title":138,"seo_description":61,"update_tm":125,"read_time":9},2336478466772,"https://ap-avatar.wpscdn.com/davatar_3d24733baf745e90a7e4bdd5f77d97b2","Quartz Clock Voltages and Waveforms  \nMeasurement data is presented here for the vacuum tube quartz clock covered in the article,“The Time Machine,” published at [http://www.tronola.com/](http://www.tronola.com/) .  \nVoltmeter Measurements  \nThese readings were taken with a digital multimeter (DMM) . AC values are true RMS.  \nItem Value  \nAC Line 121. 1Vrms  \n+150VDC rail 153. 1VDC +250VDC rail 260.3VDC  \n6.3VAC heater 6.23Vrms  \n5.0VAC heater 4.90Vrms V8-4 HVAC 276. 1Vrms V8-6 HVAC 277.2Vrms  \nMultivibrator Potentiometer Settings  \nPot Value Nom Max  \nR8  \nR9  \nR13  \nR14  \nR18  \nR19  \nR22  \nR23  \n2.66K 5.48K 24.34K 37. 14K 9.68K 55.87K 224.70K 64.75K  \n10K  \n10K  \n25K (set 100K  \n10K (set 100K  \n250K 250K  \nto  \nto  \nmax)  \nmax)  \nTube Voltages  \n(The table is on the next page.) Due to the large AC signals present, one generally cannot rely on a DMM to show accurate average DC values for these circuits. Neither can a typical DMM measure the AC values well, since peak-to-peak values are needed and the waveforms are nonsinusoidal. The readings below were taken with a Tektronix 2014 digital scope and are therefore limited by the accuracy of the scope, probe and digitizing resolution. The scope was set for 16-averages to reduce noise. Note that resolution is relative to the vertical span needed to encompass the peak-to-peak voltage swing. I would generally expect accuracy of about 2.5% of the peak-topeak swing, for both the DC and Pk-Pk values. To produce a valid DC average, the horizontal span must include at least two cycles ofthe waveform. Values shown as “~0.0”mean that the reading was insignificant relative to the vertical span.  \nTube Pin Avg VDC Pk-Pk VAC  \nV1 4 -13.7 29.0  \n6 110.0 ~0 .0  \n8 88.4 14.7  \nV2 1 ~0 .0 12.2  \n2 157.0 176.0 3 5.62 ~1 .0  \n4 -1.86 7.7  \n5 80.2 90.0  \n6 1.51 2.32  \nV3 1 -0.8 20.9  \n2 127.0 24.8  \n3 1.83 1.76  \n4 -2.41 27.0 5 127.0 28.6  \n6 1.83 1.76  \nV4 1 -3.25 47.8  \n2 135.0 45.2  \n3 3.88 4.48  \n4 -5.11 51.2 5 139.0 41.4  \n6 3.88 4.48  \nV5 1 -7.64 51.0  \n2 54.2 104.0 (1)  \n3 0.0 0.0  \n4 -29.0 106.0 (1)  \n5 62.0 78.8  \n6 0.0 0.0  \nV6 1 37.2 135.0  \n2 65.8 84.0  \n3 0.0 0.0  \n4 -14.2 81.6 5 78.4 134.0 6 0.0 0.0  \nV7 3 252.0 336.0  \n4 266.0 10.2 (2)  \n5 -2.97 58.0  \n8 12.9 7.04  \nV8 4 0.0 780.9 (3)  \n6 0.0 784.0 (3)  \n8 270.0 17.8  \nV9 2 ~0.0 ~0.0 5 154.0 3.12 (4)  \nJ1-H ~0.0 330.0 (5)  \nWaveform Images  \nV3A, 12kHz Multivibrator  \nYellow: V3-1, Grid-A  \nBlue: V3-2, Plate-A  \nV3B, 12kHz Multivibrator  \nYellow: V3-4, Grid-B  \nBlue: V3-5, Plate-B  \nTABLE NOTES :  \n1. Presence of scope probe causes out-of-sync condition .  \n2. AC is 60Hz synced to the clock (not the AC line) .  \n3. Calculated from RMS readings .  \n4. AC value is mostly “hash” from switching noise .  \n5. J1 is the outlet powering the clock.  \nV6A, 60Hz Multivibrator  \nYellow: V6-1, Grid-A  \nBlue: V6-2, Plate-A  \nV6B, 60Hz Multivibrator  \nYellow: V6-4, Grid-B  \nBlue: V6-5, Plate-B  \nV2B, Driver Amplifier  \nYellow: V2-4, Grid-B  \nBlue: V2-5, Plate-B  \nV7, Power Amplifier  \nYellow: V7-5, Control Grid  \nBlue: V7-3, Plate","cbCaifl5U4EoWdYT","https://ap.wps.com/l/cbCaifl5U4EoWdYT","pdf",165389,"English","# Voltmeter Measurements\n## Multivibrator Potentiometer Settings\n# Tube Voltages\n## Waveform Images\n## Table Notes","[{\"question\":\"How were AC and DC voltages measured in these results?\",\"answer\":\"AC values were taken with a digital multimeter and are true RMS. Tube-related voltage waveforms were measured with a Tektronix 2014 digital scope to capture nonsinusoidal peak-to-peak behavior and to derive DC averages under defined horizontal-span conditions.\"},{\"question\":\"Why is a DMM unreliable for the tube circuits in this document?\",\"answer\":\"The circuits contain large AC signals with nonsinusoidal waveforms, so average DC readings and AC measurements from a typical DMM can be inaccurate. Peak-to-peak values are needed, and the waveform shape prevents reliable DMM-based AC characterization.\"},{\"question\":\"What guidance is given for obtaining a valid DC average from the scope?\",\"answer\":\"To produce a valid DC average, the horizontal span must include at least two cycles of the waveform. Entries marked as \\\"~0.0\\\" indicate readings were insignificant relative to the vertical span.\"}]","Quartz Clock - Voltages and Waveforms - Measurement Data and Waveform Notes | PDF"]