| pchw |
I got some of these 10K 1% resistors, but I never saw anything like that. It has a hole in the middle. I wonder what is the power rating and type (carbon, metal, ceramic etc)? Can someone identify it?
Thanks, |
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| Wavebourn |
| quote: | Originally posted by pchw
I got some of these 10K 1% resistors, but I never saw anything like that. It has a hole in the middle. I wonder what is the power rating and type (carbon, metal, ceramic etc)? Can someone identify it?
Thanks, |
I would cannibalize one to see what is inside, you are happy if a metal foil or wire. |
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| frank754 |
I just ordered a few that look similar, mine are Caddock high-power, low tolerance "film resistors", they generally are in the low resistance range, but can go up to 100k or so, and are a premium price, like $3-4 each sometimes.
They sort of look like flat transistors but a bit larger, and are fairly high precision, some have flat PCB type leads (or socket leads). |
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| pchw |
Yeah, they do have a look of transistor.
The markings are 10K ohm (the symbol) 1% CE292E. The packaging is kind of like thick plastic or epoxy shell. The diameter is about 20% bigger than a pencil. I google searched CE292E but turned up nothing. Do you think it is safe to use them as 1/2W resistors? |
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| nhuwar |
If I were to bet I would say it's a copper coil resistor by it's shape.
Nick |
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| frank754 |
| Yes, that's another thing I neglected to mention, the reason some of these are so large is that they can handle often 15 watts, and some are rated up to 100 watts. I can't tell what yours are from what you say, but the ones I ordered say "MP925 100K 1% R" and are rated at 25 watts, the dimensions are .4" x .6" x 1/10" thick, and cost me about $3.50 each, so big performance in a small package. |
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| cliff |
Come on guys!
It is a wirewound ( probably manganine) precision resistor.
Designed for stability, not high power or any other audio freakiness!
I have LOTS of similar. |
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| jlsem |
| quote: | | It is a wirewound ( probably manganine) precision resistor. |
Probably a 1/4 to 1/3 watt and no more than 300v. Looks like RB53 size.
John |
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| frank754 |
The ones I got were from Allied, as I had a hard time finding a certain spec I needed, and these are 25 watts. precison, are are that small:
I was just guessing on his. |
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| pchw |
I wish they were the same type, Frank ;)
Here is another picture, Cliff, do they look like manganine?
If they are only 1/3W at most, then they are probably not much of any use, what a bummer. |
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| jlsem |
| quote: | | If they are only 1/3W at most, then they are probably not much of any use, what a bummer. |
They would make an excellent load resistor for an MC cartridge. |
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| cliff |
| quote: | Originally posted by pchw
I wish they were the same type, Frank ;)
Here is another picture, Cliff, do they look like manganine?
If they are only 1/3W at most, then they are probably not much of any use, what a bummer. |
Dunno.
I'm not sure manganine has a "look" (or a sound :D ) but if you want a stable wire-wound 1K to 1M ohm resistor in a tiny package there aren't too many alloys that one can use. |
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| Sheldon |
| quote: | Originally posted by frank754
The ones I got were from Allied, as I had a hard time finding a certain spec I needed, and these are 25 watts. precison, are are that small:
I was just guessing on his. |
Yes, the resistors themselves are small. But if you want to push any more than a few watts through them, you have to have enough radiating area to shed the heat, so they will have to be mounted on an appropriately sized heat sink.
Sheldon |
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