Quote:
Originally Posted by andy
I agree that mesh storage isn't a very useful feature anymore, but if I'm going to make room for a vintage scope, I might as well get one with everything.
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The 564 is
not a mesh storage scope... the storage takes place on the P-1 phosphor surface itself, and the stored information is "illuminated" by
low voltage electrons. In order to get usable brightness of the stored traces, at these low voltages, a fairly high current density is used. This will cause "aging" (loss of efficiency) of the phosphor areas most used for storage of traces.
This is similar to the aging observed in a 6E5 indicator "eye" for many of the same reasons... P-1 phosphor bombarded with high current (low voltage) electrons yields loss of phosphor efficiency in the most used areas. I have seen several used 564s with ugly dark areas/traces "burned" into the phosphor, seen in "store" mode...."non-store" operation is usually not degraded by these "burned" areas.
IMHO, the 564 is a lot more fun than a 561... if you get one with a good CRT, and don't use the storage function too much, it can last for many years.
jr