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Old 25th November 2011, 08:25 PM   #1
ridikas is offline ridikas  United States
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Solved.
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File Type: jpg res2.jpg (52.0 KB, 133 views)

Last edited by ridikas; 30th November 2012 at 06:48 AM.
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Old 25th November 2011, 08:42 PM   #2
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Look like Dale's. Don't know model numbers.
Doc

Like these Vishay/Dale's: Digi-Key - BC27KW-2TR-ND (Manufacturer - PR02000203272FR500)
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Last edited by thaumaturge; 25th November 2011 at 08:58 PM.
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Old 25th November 2011, 08:56 PM   #3
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Philips SFR25 or nowadays VishayBCC SFR25 5% metal film.
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Old 25th November 2011, 09:21 PM   #4
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Hi
The Last two bands look like brown and red in the piccy. If that is correct .

Brown = +- 1% Red = 50ppm . Im Guessing you already know that.
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Old 26th November 2011, 06:00 AM   #5
ridikas is offline ridikas  United States
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Thanks for all of the help. Yup, the last two bands are brown and red on all of the resistors. They are 1% and 50ppm. I suppose this rules out the Vishay BC Components SFR25, as they are all 100-250ppm, even though visually they look very similar. Also, the SFR25s are marked with only either 4, or 5 band color identification, whereas the mystery resistors are all 6 band.

Any other ideas, or suggestions?
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Old 26th November 2011, 06:24 AM   #6
ridikas is offline ridikas  United States
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I think I've found them. Thanks to Jeronimo2003 for pointing me in the right direction. I believe they are Philips MRS25. Here is a picture from an eBay seller, they look identical and have identical specs:
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Old 26th November 2011, 07:15 AM   #7
Elvee is offline Elvee  Belgium
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I am sure they are of german origin, but I can't remember the exact manufacturer.
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Old 26th November 2011, 07:40 AM   #8
mjf is offline mjf  Austria
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hello.
this could be a (vishay) beyschlag res, mbb0207 (1%, 0.6w,50ppm).
here is a picture of a new one with rohs conformity.
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Old 26th November 2011, 07:45 AM   #9
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Hi

Out of intrest what are these resistors installed in.

Im guessing with the simple exterior of resistors lots will look exactly the same.

Regards Ian
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Old 26th November 2011, 07:49 AM   #10
ridikas is offline ridikas  United States
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I found them! They are Philips MRS25 and are now made by Vishay. They look and spec identical. Thanks to Jeronimo2003 for pointing me in the right direction. Here's a picture of some for sale on eBay:
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