I have an SB2 (I am not the original owner, but I have had it for 5 or 6
years) that has had the VFD develop light and dark areas.  I do not
remember it being this way when I purchased it, but I can't be sure. 
There is a general unevenness to the brightness of the display.  With
maybe 1/4 of the display to the right of center being particularly dark.
I know that a VFD can fade over the years and the fading can be uneven.
But I expected significant fading to take longer than ~10 years.  I have
devices with VFD that stay on 24/7 and are 20 years old and they still
look fine.  But I am not familiar enough with VFDs to know if this is a
problem with the display (and would require replacing) or could it be an
issue with the power supply driving the VFD?  I will add a picture
tonight to show what it is doing.  

I have read the display is a Noritake MN32032A, but I am not sure they
are still available.  Thanks for any input.


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