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ALLIED
PARALLEL-RESISTANCE  /  SERIES-CAPACITANCE
CALCULATOR
( 12"  /  32 cm )



DETAIL ...



SCALES  of  the   A L L I E D  RESISTANCE / CAPACITANCE  CALCULATOR
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ALLIED RADIO CORPORATION  Chicago, Illinois / USA            (1945)

Calculations  of  Parallel  Resistance  &  Serial  Capacitance ...
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FRONT SIDE:   10 - 100 MMFD  /  100 - 1000 MMFD  / .001 - .01  MFD
               1 - 10  OHMS  /   10 - 100  OHMS  /  100 - 1000 OHMS
             ------------------------------------------------------
BACK SIDE:   .01 - .1 MFD    /   .1 - 1   MFD    /    1 - 10 MFD
               1 - 10 MOHMS  / 10 M - 100 MOHMS  /  1 G - 10 GOHMS
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H O W - T O - U S E :
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(A) To find the value of two resistances in parallel ...
    USE BLACK FIGURES ONLY
   (1) Move sliding scale so that the two resistance values (one on
       the sliding scale  and  the other on the fixed scale) are in
       exact alignment.
   (2) The parallel resistance is now indicated by the arrow marked
       "Total Resistance" at the right end of the calculator.

(B) To find the value of two capacitances in series ...
    Follow the same procedure, but USE ONLY THE RED FIGURES.

R E M A R K S :
***************
The  A L L I E D  Slide-Calculator  came  in a cardboard cover with
an instruction sheet.  There was also included an INSTRUCTION SHEET
for the  S H U R E  REACTANCE  SLIDE RULE - but NOT the SHURE-SR!

There is a PRINT-ERROR in the last slide of the back side:
Instead of  " .1 - 1 MegOhms "  it should be  " 1 G - 10 GigaOhms "
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impressum:
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© C.HAMANN    http://public.beuth-hochschule.de/~hamann    06/01/13