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Old 6th March 2006, 05:40 PM   #1
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Default Resistor type and power rating


Would someone please help me find the power rating for a resistor I am coping with while repairing my amplifiers. I am not sure what type it is either... carbon film maybe? The cylinder portion is 1.7 cm long.

This is my first post, it seems like a reasonable question but please let me know if it is not suitable for this forum.

Thank you

Here is a scan of the resistor in question:
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Old 6th March 2006, 05:48 PM   #2
anatech is offline anatech  Canada
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Hi suspired,
That could be a one or two watt unit. How long is it?

I would use a metal oxide resistor to replace it in the same wattage rating, or slightly higher. At 18K I'm guessing it's a two watt.

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Old 7th March 2006, 03:30 AM   #3
lndm is offline lndm  Australia
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This looks like a recent (70's) carbon composition resistor. It is probably rated at 1/2 watt. These resistors are larger than a more modern resistor with the same dissipation.

Metal oxide resistors are often used in power supplies, but I dont like their sound. Carbon comps sound good.
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Old 7th March 2006, 04:01 AM   #4
arnoldc is online now arnoldc  Philippines
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That looks like my allen bradley, maybe 1 watt.
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Old 7th March 2006, 05:20 AM   #5
G is offline G  United States
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You can replace it with a 5 watt Kiwame carbon film and have no worries.
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Old 7th March 2006, 02:52 PM   #6
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Many thanks Anatech, Indm, ArnoldC, and G for your help.
Your suggestions and advice not only helped me to look in the right places on the net but also led to finding answers for a couple of other questions.
Anyway, I was able to confirm, due to it's size, and by comparing it to a Kiwame I had, that it is an Allen-Bradley 18K 5% 2W.

Here are some other details...
My workshop.
( this web site is very new and extremely messy... be warned )
Thanks again,
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