Perrygraf KDI Pyrofilm Reflectometer Calculator

Country of manufacture: USA,            Date of manufacture: ____
Overall length: 21.5 cm,          Width: 8.0 cm.,           Weight: 26.0 gms.
Materials: all cardboard
Cursor: no cursor
Scales: specialized
Front: Coupler Directivity -db [ Reflection Coefficient -ρ, Standing Wave Ratio ] Coupler Directivity -db [ Return Loss -db, Mismatch Loss -db ] Coupler Directivity -db
Back: Terminal Selector Data
Condition: C2 (Mint, without one or more extras)
Came with: nothing