[ARC5] BC-458 and 696 parts question..

[Michael Hanz]

On 12/2/2019 7:00 PM, hwhall at compuserve.com wrote:
> Mike's scan shows 3 inches long dimension for the plastic bit. Mine 
> measures 2 & 13/16 inches.  I note that the window in the metal part 
> is slightly wider than this, leaving a narrow air gap at either end.
> Distance between the outer hashmarks on the plastic are 2 & 7/16 inches.
>
>  Perhaps mine has undergone some shrinkage in dimensions?

It apparently has, Wayne.  There is about .020" shrinkage in the top 
dimension of mine as well (though not the bottom dimension, which is 
still 3.00").  You can see a slight bowing in the color photo.  But the 
length of the aluminum retention rails before the crimps is also 3.00", 
suggesting that the original length is pretty close to that.

It could be worse.  I have an example here that has shrunk to 2.56" OAL 
and is a much darker brown color.  The crimped top and bottom rails 
apparently kept the vertical dimension less reduced. Somewhere in the 
stacks there is one that is about 2" in length and looks like a 
shriveled brown potato chip, but I wasn't able to find it quickly.  It 
would be a good lead for the web page on the subject, so I'll try to 
find it soon.

-Mike

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