Resistor Watts

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bgd73

Member - Posts: 2

Joined: October 08, 2006

Location: United States

Posted: October 08, 2006 at 12:34 PM / IP Logged

My radio needs a 1k ohm resistor on the power, what watts do I use. After a trip to radio shack, the .5watt 1kohm is a bit small. any ideas? I have found them up to 25 watt and many inbetween. Large to small. The radio is a 35x4 panasonic.

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bgd73

Member - Posts: 2

Joined: October 08, 2006

Location: United States

Posted: October 08, 2006 at 12:43 PM / IP Logged

watts == amps x volts

I found it on the web

2.5x12== 30 watt resistor @ 1k ohm

I thank me for helping me :)

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fakepete

Copper - Posts: 99

Joined: April 21, 2002

Location: United States

Posted: October 08, 2006 at 4:09 PM / IP Logged

why does it need a resistor?

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Flakman

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Joined: April 25, 2005

Location: United States

Posted: October 08, 2006 at 11:27 PM / IP Logged

I, too am very much interested in why you need a resistor.

The Flakman

I feel strange. I have deja vu and amnesia at the same time.

John | Manteca, CA

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aznboi3644

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This member consistently provides reliable information

Joined: May 01, 2006

Location: United States

Posted: October 09, 2006 at 6:01 PM / IP Logged

But why for the power line??????

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Flakman

Copper - Posts: 365

Joined: April 25, 2005

Location: United States

Posted: October 09, 2006 at 6:44 PM / IP Logged

Looks like several unanswered questions here.

The Flakman

I feel strange. I have deja vu and amnesia at the same time.

John | Manteca, CA

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Mad Scientists

Silver - Posts: 380

Joined: February 07, 2004

Location: United States

Posted: October 09, 2006 at 8:59 PM / IP Logged

bgd73 wrote:

watts == amps x volts

I found it on the web

2.5x12== 30 watt resistor @ 1k ohm

I thank me for helping me :)

Let 'me' know that s/he got it wrong <grin>... to calculate wattage of a resistor you multiply the current through the resistor with the voltage *drop* across the resistor.. In addition to that, it's an impossibility to push 2.5 amps through a 1k ohm resistor with only 12 volts..

What are you trying to do?..

Jim

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Resistor Watts

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