IWA  /  DE MUIDERKRING, Bussum / NL
RADIO SLIDE RULE   ( 8 1/2" / 22 cm )





Back to IWA-51904 RADIO Main
DE MUIDERKRING, Bussum / Nederland                       (1960)
***************************************************************
made by  IWA / F.RIEHLE, Esslingen / Germany 

S C A L E S   of  the    I W A      » RADIO «       Model 51904
===============================================================
Front Side              [ RED ]                       Back Side
===============================================================
( 0 ...  20 cm Ruler )
                                                      NOMOGRAM:
                                      I2/I1 ;  Decibel ;  P2/P1
A      X2                             U2/U1 ;    db    ;    x
---------------------------------------------------------------
B      X2                                    S      sin(0.01X);
[ Capacity  =  1 pF .. 10 nF ;                        sin(0.1X)
      Inductivity  =  10 mH .. 0.1 μH ]      L      lgX
C      X                                     T      tan(0.1X)
---------------------------------------------------------------
D      X
[ Frequency  =  10 kHz  ..  500 MHz ]                  DIAGRAM:
[ Wavelenght =  30 km   ..  0.6 m ]       Resistance Color Code  

( 0 ...  7 7/8" Ruler )

R E M A R K S :                      (  1° = 60' ;   1' = 60" )
===============================================================
The TRIGONOMETRIC SCALES are divided in MINUTES(') & SECONDS(")

S keyed to A/B ;  T keyed to C/D

                     Historical Remarks ...
impressum:
***************************************************************
© C.HAMANN  http://public.beuth-hochschule.de/~hamann  05/16/10