5 W  LABOR  PRECISION  POTENTIOMETERS       BECKMAN / USA  (1965)
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10-Turn (= 10*100 Marks) High-Resolution Potentiometers/Resistors  

100 Ω ; 1 kΩ ; 10 kΩ ; 100 kΩ   Serie »A«   with  »RB«  DUODIALs

The SCHEME of the MODEL »A« HELIPOT ...

            

As the name "HELIPOT" associates:  On a helical shaped insulator
a thin resistance wire is wounded on its full length .  When the
dial is turned, the (3rd) contact moves along the helix ...

             Have a look at R-"DECADES" and an -"OCTADE"
impressum:
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© C.HAMANN      http://public.BHT-Berlin.de/hamann       04/11/09