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RVal
by Brian Taylor
Resistors are normally supplied in ranges that have 6, 12, 24, 48, 96 or 192 values per decade. RVal helps you select the best values to produce a given ratio or difference, to connect in series or parallel to produce an exact value, the nearest preferred value to any given value, find the preferred value required in parallel with an existing resistance to produce a desired value or display a list of the values in one decade of any range.
electronics resistors preferred value parallel series ratio e6 e12 e24 e48 e96 e192 electronic engineers solution finding optimum preferred resistor values
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HAMIC
by SweetScape
HAMIC, the HAM Intelligent Calculator, is designed to aid HAM perform a number of calculations. HAMIC has a simple to use, but powerful graphical interface that allows solving simple circuits such as resistors in series or parallel, or more complex circuits such as L networks or T networks. As well, other calculations such as SWR and reactance conversions are supported.
ham calculator circuits networks swr reactance resistors capacitors impedance inductance frequency l-network pi-network t-network perform circuit network calculations swr reactance conversions
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