Archive of Collections



Details and Image



TypeModel No.MakerCountryConstruction
Material
DateScale LengthArea of Use
Circular and Spiral Slide Rules
GE / 188 Electronic Countermeasures Calculator
GENERAL ELECTRIC
USA
Cardboard
1970s
Ø 19.7 cm
Aviation

Notes: Monochrome version of model 138. For the design or evaluation of electronic countermeasures to radar and line-of-sight communications systems. It is based on two basic transmission equations but is complex to use as the design consists of 5 separate layers that can be rotated with respect to one another.


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