Back on 2011-12-15, I (quoted and) wrote
   The name of
this student was William Hewlett.  The product was the
 model 200A audio oscillator. 
 Hm, I have some very old (steel case with, I think,
brown speckle
 finish, all-valve construction, land-anchor weight) HP electronics.
 I should check model numbers; I might even have a 200A. 
 
The item I had in mind turns out to be a 202A.
I can see corners of similar gear on a closet shelf, though; it's
possible there's a 200A lurking there.  I'll probably be reporting
details here some one of these months - I want to get that stuff
cleared out and either stashed or handed off to a good home.
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