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 Post subject: Resistors
PostPosted: 05 May 2010, 08:26 
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Joined: 05 May 2010, 08:20
Posts: 6
Hi Folk,
do you think I can replace *ALL* the resistors with 1/2 W ones or I will see fireworks in my bedroom? (This since I have a couple of 1/2 W resistors). There will be any performance deterioration as compared against the original valuers?

Bye,

Giammarco


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 Post subject: Re: Resistors
PostPosted: 05 May 2010, 15:28 
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Joined: 07 Feb 2010, 15:42
Posts: 151
Location: England
hi,
Cant be sure whether this is true but i think that resistors deteriorate under high temperature so it would be logical that one that have high wattage would work better

It works something like that :P Besides 1/2W resistors are still relatively small wattage ones, kiwame audio resistors for example are 5W

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 Post subject: Re: Resistors
PostPosted: 05 May 2010, 20:00 
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Joined: 14 Oct 2008, 17:35
Posts: 901
Location: Dartmouth, Nova Scotia
Hello Giammarco

kkkittehz is right, resistors do not do well under high temperatures, the only types that can tolerate higher temperatures are the wire wound ones.

but what is the rating of the original resistors and what are they in?

Kiwame resistors are very good indeed :up: , but 5 watt ones are over kill, and would become pricey.

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 Post subject: Re: Resistors
PostPosted: 06 May 2010, 00:38 
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Joined: 05 May 2010, 08:20
Posts: 6
I would replace exaclty the same values as regards their resistance, the only change would be their power: 1/2 W instead of 1/4 W.

Giammarco


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 Post subject: Re: Resistors
PostPosted: 06 May 2010, 18:10 
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Joined: 07 Feb 2010, 15:42
Posts: 151
Location: England
Im back!

The ohm rating of a resistor tells you how much it hinders the flow of current, the wattage rating is how much heat it can dissipate, there are proper calculations to do this but genrally 1/2W resistors will be sufficient, 1W resistors would definately be safe, 5W resistors are overkill but they do sound good. Anyway i wouldnt personally use 1/4W resistors at all, even in my GCSE electronics alarm box that was only powered by a 9V PP3 cell I still used 1/2W resistors.

:thumbsup:

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 Post subject: Re: Resistors
PostPosted: 07 May 2010, 01:46 
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Joined: 05 May 2010, 08:20
Posts: 6
Thank you kkkittehz!!
I'll go for 1/2 W then...

Bye,

Giammarco


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