Hewlett Packard HP 400E is a lot simpler made compared to the HP 3400A,
this HP 400 had a few problems, loose connections, and resistor divider far off in the front end, recalibrated all, now it works perfectly again.
see video about HP 3400A :    • HP 3400A RMS Voltmeter thermocouple c...  


#teardown
#hewlettpackard
#vintage

I use auto generated subs, I go thru them my self, but i am far from perfect at finding all errors, so if you find errors worth fixing, please comment (or PM) with the TIME in the video you saw the error, i will be happy to fix it. This also apply to the Danish version.

(Thanks to all my Sponsors / Traders / Swappers / Sellers / Buyers, without your support and constant flow of cool items in/out, none of this would be possible)