> > 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
________________________________________________________________________
Where do you get ICE bandpass filters & beverage matching boxes? The
same place that pays for the hosting of this list: The eHam Store.
Order online at http://store.eham.net.


FAQ on WWW: http://www.contesting.com/FAQ/towertalk
Submissions: towertalk@contesting.com
Administrative requests: towertalkREQUEST@contesting.com
Problems: ownertowertalk@contesting.com
