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## [TowerTalk] Re: Carbon Resistors Beverage Terminations

 To: [TowerTalk] Re: Carbon Resistors Beverage Terminations w7ni@easystreet.com (Stan or Patricia Griffiths) Mon, 11 Feb 2002 16:42:22 -0800
 ```Hi Don, You must have been absent from class on the day they taught Ohms Law. I have NO IDEA where you ever got the notion that the power rating of a string resistors or a parallel combination is equal to only the power rating of the lowest single resistor. Absolutely not true. Each resistor in the network will dissipate power in inverse proportion to its resistance. If it is a series string of identical values, like 10 each 47 Ohm resistors, each one will dissiate 1 tenth of the total power. Ten half watt resistors can EACH dissipate a half watt, or 5 watts total. Two 1000 Ohm resistors in parallel (or any other identical value for two parallel resistors) will each dissipate equal power. If the resistors are rated at 2 Watts each, then the parallel combination will dissipate 4 Watts. Stan w7ni@easystreet.com Don Havlicek wrote: > Comments inserted below: > > Stan or Patricia Griffiths wrote: > > > > Hi Bob, > > > > Thanks for the info. > > > > Two parallel 1K, 2 watt resistors would give you 500 ohms at > > 4 watts . . . > > YES > > > A series string of ten 47 Ohm, 1/2 watt would give you 470 > > Ohms at 5 watts. > > NO .. the power rating will still be 1/2 WATT ! > > > > > 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 > > Power rating of a series string is the same as the LESSER/LEAST powered > element. > > Don - N8DE > > > > > I am sure I can come up with some of these combinations if > > anyone needs them. How about \$2 per set plus postage? > > > > Stan > > w7ni@easystreet.com > > > > Robert Shohet wrote: > > > > > HI Steve, > > > > > > How about (approximately) 500 ohms and 1 - 5 watts? > > > > > > 73 > > > > > > Bob KQ2M > > > > ________________________________________________________________________ > > 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: towertalk-REQUEST@contesting.com > > Problems: owner-towertalk@contesting.com ________________________________________________________________________ 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: towertalk-REQUEST@contesting.com Problems: owner-towertalk@contesting.com ```
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