[TowerTalk] Re: Carbon Resistors Beverage Terminations

[Brad Rehm]

> > A series string of 220 Ohms and 270 Ohms, both 2 watts,
> > would give you 490 Ohms at 4 watts.
>
> NO .. the power rating will be 2 WATTS

The usable power rating of the network would be a little less than 4 Watts
because the power dissipated in each 2 Watt resistor would be less than it
would be if he only used one resistor: 220/490=45% of 4 Watts & 270/490=55%
of 4 Watts (a little too much for the resistor).  The current is the same in
both resistors, and dissipation is inversely proportional to the resistance:
P=I^2 R.

Brad, KV5V
Jarrell, Texas



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