https://stream.echo6.co/videos/watch/1603bfe5-8a14-4966-84ed-ea7d61ac7646 Teardown Tuesday. Inside the HP 3457A 6.5/7.5 digit bench multimeter. Service Manual: http://cp.literature.agilent.com/litweb/pdf/03457-90011.pdf http://cp.literature.agilent.com/litweb/pdf/03457-90012sg.pdf http://f6fzk.free.fr/DOCUMENTATION/DOC%20HP/CD1/3457a_svc.pdf User Manual: http://cp.literature.agilent.com/litweb/pdf/03457-90003.pdf LM399 Reference: http://cds.linear.com/docs/en/datasheet/LM199399fb.pdf Forum Topic: http://www.eevblog.com/forum/blog/eevblog-426-hp-3457a-multimeter-teardown Photos: http://www.flickr.com/photos/eevblog/sets/72157632803534496/ EEVblog Main Web Site: http://www.eevblog.com EEVblog Amazon Store: http://astore.amazon.com/eevblogstore-20 Donations: http://www.eevblog.com/donations/ Projects: http://www.eevblog.com/projects/ Electronics Info Wiki: http://www.eevblog.com/wiki/ Wed, 10 Jun 2026 07:04:07 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://stream.echo6.co https://stream.echo6.co/client/assets/images/icons/icon-512x512.png https://stream.echo6.co/videos/watch/1603bfe5-8a14-4966-84ed-ea7d61ac7646 All rights reserved, unless otherwise specified in the terms specified at https://stream.echo6.co/about and potential licenses granted by each content's rightholder.