The pad wasn't available until after the 2465 had run its
course, having been introduced with the B models... after
serial number B050740, I believe. It was available as a
modification kit for all models.... and all cabinets are
interchangeable, so some mixing and merging has certainly
occurred over the years.
Its purpose was two fold. It is pretty popular to put the
2465 on the shelves that are above most commercially made
workbenches. And those shelves are usually too short to
allow the 2465 to sit upon its feet, assuring proper ventilation..
The 2465's fan sucks fresh air through the holes in the cabinet
in places where it is needed, so undoubtedly some scopes were
damaged by having the holes around the vertical preamp hybrids
blocked by the carpeting that is commonly on these instrument
shelves. The black plastic keeps the scope up enough to allow
air to flow where it must.
The secondary purpose is to prevent damage to the cabinet that
would make it hard or impossible to remove. The vertical preamp
covers have hard points where the springy grounding clips are
mounted to the back of the preamps. If you bend the cabinet
in this area... even a little..., you won't be able to slide it
by those hard points, without cutting the cabinet.
It is a good thing to have.
-Chuck Harris
satbeginner wrote:
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Hi all,
As an addition to my collection I recently got a 2465 that had the rubber/plastic ribbed pad as well.
The cut-out in the material to me makes it a TekTronix original, especially because it keeps the ventilation holes exactly free.
It either serves as extra protection for the bottom, and by doing that extra protection for the interior electronics,
it also can be a saveguard that prevents the ventilation holes to be blocked when stacking devices, as people often do.
Some pictures here: /g/TekScopes/album?id=89635
Un saludo,
Leo
