[Milsurplus] Precision resistors in WW II gear

[Peter Gottlieb]

I have definitely seen precision resistors, though by no means "extensive" use. 
  The highest precision ones were, IIRC, 0.25% and consisted of resistance wire 
wound on little spools with a varnished fabric label and handwritten values.

I don't remember what specific equipment they came from, but the school I went 
to had gotten a truckload of what seemed to be research, radar and nuclear lab 
instrumentation, some of which was in the form of precision test sets.

I remember fondly the days of the TS-147/UP X band spectrum analyzer and the 
klystron signal generators, the aircraft strain gauge optical galvanometer film 
recorders, PPI displays and other toys.  That stuff had magic to it!

Peter


J. Forster wrote:
> Has anyone seen extensive use of 1% or better resistors in WW II era gear? I
> have not, except possibly for some meter shunts.
> 
> The reason for the question is an argument on using 1000 or 20,000 ohm/volt VOMs
> to calibrate a tube tester on another list. The 20K/volt is available, and I
> suggested a shunt to make it 1K/volt. The counterclaim is the accuracy will be
> inadequate, which I do not believe.
> 
> -John
> 
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