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So, built up a quick and dirty variable power supply based on a LM317. Driving the filament close to 3V provides a much brighter picture. However, it is really washed out and the contrast doesn't seem to be working although the brightness does. Is there anything other than a weak CRT that can cause the washout? Any ideas why the contrast isn't working when it was before? My DMM finally crapped out, bringing experimentation to an end for the evening. I ordered another but I am headed to work until Wednesday anyway.
I hope to have enough time to build a rejuvenator this week but it is going to be a busy one.
Thanks!
Jonathan
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