HP3466A DMM Repair and Upgrade, Part 1
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- Опубліковано 22 лип 2024
- In this video I repair a 42 year old Digital Multimeter. This is an HP 3466A 4.5 digit from 1979 but is quite full-featured, and has some nice low measurement ranges. The HP 3466A is the big brother of the 3.5 digit HP3435A. I hope this helps anyone else trying to repair this or other similar products.
In Part 2, I plan to upgrade the old Sealed Lead Acid battery to a modern Lithium battery.
See my web page for this project with more detail at:
www.djerickson.com/hp3466a-dmm
And all my other web pages at:
www.djerickson.com
Enjoy!
Dave
Thanks so much for the video. Just picked one up for junk value and found the socketed IC had crept out. Reseated and tested, now working as well as the fluke. Next to calibrate and replace the electrolytics!
Just wanted to thank you for the useful information and repair of the 3466A. I've had one on my bench for 5 years or more and love it. However recently it went u/s with a +OL message causing me to search the web for info on repair and found your page. Turned out the repair was simple. The 2200 uF cap on the + power supply had gone O/C supplying 120 Hz to the rest of the instrument. New cap solved that problem. However seeing your mod for a Lithium battery triggered a desire to do the same. My meter had the battery electronics but never had a battery. I went ahead and made the mods you set out and installed a "battery" with two of the Li cells. Runs beautifully. Charges to 8.33V runs for more than 5 hours before cutting off at a little over 7 V. Reccomend the fix. 73, W0QM
I love this multimeter, I recently bought it. and it's fast in autorange mode when measuring resistors. It would be good if a buzzer could be inserted
@8:15 : About the replacement Battery is expensive but, I replaced my battery and it charges/works fine to power the unit. No I have to fix the DMM part of it - My HP3466A displays OL constantly so I look forward to watching Part 2 !!! Thanks for making your videos. Liked and Subd.
I enjoyed watching this repair. Interesting how many issues developed while the meter was in storage! My repair was a lot easier. When I received my HP 3466A it had intermittent operation. I cleaned and lubricated the switch bank and it has been working ever since. I also replaced the Gates cells with a 6v SLA battery. It is my daily goto meter when I am working at my bench. I am amazed as to how accurate it is on all ranges - checked with a HP 34401A. Love this old HP stuff.
Hey Dave! Glad to know you are well! We are missing you!
Thanks. I just found out that the HP 3435A is this guys' 3.5 digit sibling. Same case, battery and charger, controller. It explains the extra digit stuff.
Interesting repair(s), thanks for the detailed troubleshooting. A fairly weird unit with 7v logic, 10KHz clock and no micro!
I have some HP3468As, and they have their own set of (quite different) weirdnesses...
Superb video. Congratulations! I have one this and is a wonderful DMM!
Yesterday I made a repair in my DMM but is a simple repair. I have one of 2.7 ohm resistor in series with transformer primary winding burned. I have plans to follow your retrofit to put 2 18650 batteries to power my DMM. I was thinking about it and today I read your text explaining how to adapt them.
Where is this "text explaining how to adapt them" online? PLEASE - I want to do so like wise!!!
@@joeteejoetee Go to Dave Ericson engineering He made a you tube video explaining how to do this.
Part 2? Or did it go the way of the lead acid batteries?
I did the change to Li batteries. It's described on my HP3466 web page www.djerickson.com/hp3466a-dmm. I don't think I'll do a video on it. Thanks for asking.