EEVblog #709 - EDC 4601 AC Voltage Standard Teardown

Dave does some performance checks and then tears down a Krohn Hite EDC 4601 0.05% 6 decade 1ppm resolution 0-1000V AC voltage standard.

Service Manual with schematics: http://www.eevblog.com/files/4601ServiceManual.pdf

MV106 DC Voltage Standard: https://www.youtube.com/watch?v=onqsjDJq4I0

User manual: http://www.krohn-hite.com/htm/ServiceSupport/PDF/Manuals/4601%20Manual.pdf

Datasheets:
Vactrol: http://www.excelitas.com/downloads/dts_vtl5c3c4.pdf
XR2228 Multiplier/Decoder: http://html.alldatasheet.com/html-pdf/119347/EXAR/XR-2228/96/1/XR-2228.html
Epson SPG8640 oscillator/divider: http://www5.epsondevice.com/en/quartz/tech/discon/epsondiscon/2000catalog/spg_8640series_e.pdf

Forum: http://www.eevblog.com/forum/blog/eevblog-709-edc-4601-ac-voltage-standard-teardown/

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