Ripple is about 1.5v on the 150v supplies and about .5v on the 50v
supply. This site:
has the calibration procedure for the 3439A which gave me some more
good information.
This site: mentions the
3440A which is very similar and their unit has the same symptoms:
"The nixie tubes light up, but multiple segments are on
simultaneously" so I am thinking this problem is common on these
units. Thanks for the replies so far.
BL
--- In hp_agilent_equipment@..., "Jorgen Lund-Nielsen"
<dj0ud@w...> wrote:
--- In hp_agilent_equipment@..., "computeruser04"
<computeruser@s...> wrote:
Hello All
I was just given an old HP 3439A Digital Voltmeter to play with.
It has the 3443 High Gain/Auto Range plugin. The Nixie tubes
light but display random digits. I have searched for a schematic
and found nothing. Really, like others have said here before, its
the challenge to see if I can get it functioning, so any info
about
it is appreciated.
Thanks
BL
Did you check all supply voltages for ripple?
Power Supplys has to be checked first, ever!
Jorgen
