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Author Topic: What kind of resistor is this?  (Read 5037 times)

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Offline Chad1Topic starter

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What kind of resistor is this?
« on: July 20, 2014, 03:44:48 am »
I'm fixing a TV and I noticed a couple of these 10? (5%) resistors blew up. I'm trying to order replacements on Digikey but I'm not sure what type they are. Based on a few Google searches I'd guess they're metal oxide film resistors, but I could be wrong. I'd appreciate some education. Thanks!

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Offline XOIIO

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Re: What kind of resistor is this?
« Reply #1 on: July 20, 2014, 03:49:09 am »
I think those are just metal oxide film ones, that or some high temp ones  :-//
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Offline johansen

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Re: What kind of resistor is this?
« Reply #2 on: July 20, 2014, 03:53:42 am »
looks like 100 ohms to me.

brown black silver would be 1 ohm, brown black gold gold would be 10 ohms, 5%
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Offline c4757p

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Re: What kind of resistor is this?
« Reply #3 on: July 20, 2014, 03:57:37 am »
Green is often for flameproof resistors, but the colors aren't really standardized. A regular power resistor should do. I'd offer an opinion as to the power rating, but I really can't tell what size those are :P

brown-black-black-gold is definitely 10 ohms, not 100...
1 0 (100), 10%

Quote from: johansen on July 20, 2014, 03:53:42 am
looks like 100 ohms to me.

brown black silver would be 1 ohm, brown black gold gold would be 10 ohms, 5%
Brown black silver is 1 0 (10-2), or 0.1 ohm, assuming you left off a gold tolerance band there.
(If not, then it's 1 (100), or 1 ohm, and 10%. Three-stripe resistors are quite uncommon though.)
Brown black gold is 1 0 (10-1), or 1 ohm, 5%.

But from the picture, I'm not so sure that's brown. Red, giving 20 ohms, would also be possible. Damn colors are always funny, and the camera probably doesn't help either...
« Last Edit: July 20, 2014, 04:01:11 am by c4757p »
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Offline mij59

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Re: What kind of resistor is this?
« Reply #4 on: July 20, 2014, 04:00:50 am »
Hi,

It could be a fusible resistor, do not replace it with a "normal" one.
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Offline c4757p

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Re: What kind of resistor is this?
« Reply #5 on: July 20, 2014, 04:02:07 am »
Quote from: mij59 on July 20, 2014, 04:00:50 am
Hi,

It could be a fusible resistor, do not replace it with a "normal" one.

Good point, especially considering it did "fuse".
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Offline johansen

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Re: What kind of resistor is this?
« Reply #6 on: July 20, 2014, 04:05:54 am »
yeah you're right. 10 ohms.

that explains why it blew up like that. 100 ohms would need a lot more volts, more than what is available in most of those crt circuits.
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Offline Chad1Topic starter

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Re: What kind of resistor is this?
« Reply #7 on: July 20, 2014, 04:51:34 am »
Here's a photo to help with sizing... I should also add that they read as open with a multimeter. Does this new information help with determining the resistor type and/or any other specs?

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Offline Chad1Topic starter

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What type of resistor is this?
« Reply #8 on: July 20, 2014, 04:54:45 am »
I'm fixing a TV and I noticed a couple of these 10 ohm (5%) resistors blew up. I'm trying to order replacements on Digikey but I'm not sure what type they are. Based on a few Google searches I'd guess they're metal oxide film resistors, but I could be wrong. They read as open on a multimeter. I'd appreciate some education. Thanks! [Also posted in the Repair section]

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Offline c4757p

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Re: What kind of resistor is this?
« Reply #9 on: July 20, 2014, 04:58:32 am »
It seems quite likely to be a fusible, considering the low value, the fact that it blew cleanly open, and the fact that they're common in TV circuits. 2W, maybe? 3W? Probably not more.

Here's a 3W that would probably be suitable: FKN3WSJT-73-10R

It might be tempting to oversize, as we're not completely sure of the power rating - but it is best not to go too big, or it'll take more current than designed to fuse it. I'd stick to 2W or 3W.
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Offline mij59

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Re: What kind of resistor is this?
« Reply #10 on: July 20, 2014, 05:08:09 am »
Check the rest of the circuit, what caused the resistor to blow may be still present.
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Offline David Hess

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Re: What kind of resistor is this?
« Reply #11 on: July 20, 2014, 05:25:05 am »
It looks like a metal oxide flame proof resistor to me.  The ones I normally buy are light powdery blue.
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Offline fubar.gr

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Re: What type of resistor is this?
« Reply #12 on: July 20, 2014, 09:30:55 am »
They could  be inductors, not resistors
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Offline Monkeh

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Re: What type of resistor is this?
« Reply #13 on: July 20, 2014, 09:34:19 am »
Looks like a fusible resistor to me.
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Offline PE1RKI

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Re: What type of resistor is this?
« Reply #14 on: July 20, 2014, 10:54:09 am »
looks like 1watt film resistor to me.
edit: somehow this post got added to this thread 6 hours after i posted it.  :o :o :o
« Last Edit: July 20, 2014, 05:47:05 pm by PE1RKI »
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Offline Chad1Topic starter

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Re: What type of resistor is this?
« Reply #15 on: July 20, 2014, 04:35:35 pm »
Thanks, everyone. I ordered a couple different kinds so hopefully at least one will work!
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Offline Chad1Topic starter

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Re: What kind of resistor is this?
« Reply #16 on: July 20, 2014, 04:35:46 pm »
Thanks, everyone. I ordered a couple different kinds so hopefully at least one will work!
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