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Components and Circuits For discussions about component types, alternatives and availability, circuit configurations and modifications etc. Discussions here should be of a general nature and not about specific sets.

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Old 19th Apr 2021, 2:35 am   #1
100grand
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Default Anyone seen these old 2% resistors before?

I'm trying to find out if these resistors are thick film resistors. This board was built in 1978 with all RS components parts, but from what I can tell, carbon film was not available at +/-2% back then. Anyone ever seen them before? They seem like a unicorn. I can't find any of them and I can't find any info about them.
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Old 19th Apr 2021, 6:04 am   #2
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Default Re: Anyone seen these old 2% resistors before?

Used to sell them ;
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Old 19th Apr 2021, 6:48 am   #3
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Default Re: Anyone seen these old 2% resistors before?

I remember Maplin selling these (or something very like them) way back in their early days, they looked disappointingly like cheap miniature carbon comps!
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Old 19th Apr 2021, 7:36 am   #4
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Default Re: Anyone seen these old 2% resistors before?

Dont they just turretslug?

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Old 19th Apr 2021, 5:53 pm   #5
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Default Re: Anyone seen these old 2% resistors before?

Quote:
Originally Posted by Restoration73 View Post
Used to sell them ;
wow. there they are. yep. Thank you. Are these tough to find or is it just me?
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Old 19th Apr 2021, 7:10 pm   #6
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Default Re: Anyone seen these old 2% resistors before?

Made by Neohm of Italy. The company’s symbol (Omega) is on the bandolier tape.
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Old 19th Apr 2021, 7:25 pm   #7
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Default Re: Anyone seen these old 2% resistors before?

Quote:
Originally Posted by dazzlevision View Post
Made by Neohm of Italy. The company’s symbol (Omega) is on the bandolier tape.
Awesome info! thank you.
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Old 19th Apr 2021, 9:38 pm   #8
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Default Re: Anyone seen these old 2% resistors before?

Used lots of these in the 1980s - very reliable and spot-on resistance values.
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Old 19th Apr 2021, 10:58 pm   #9
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Default Re: Anyone seen these old 2% resistors before?

Are these the same size as the carbon-type resistors in equivalent watt value or are these smaller? i.e. is the size of the 0.5w thick the same as 0.5w carbon?
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Old 20th Apr 2021, 12:11 am   #10
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Default Re: Anyone seen these old 2% resistors before?

Not sure about U.S. sizes, but about half size, i.e. length 6.4mm, diameter 2.3mm.
I have also found I have some with 1% tolerance.
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Old 21st Apr 2021, 6:32 pm   #11
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Default Re: Anyone seen these old 2% resistors before?

IIRC these were described as thick film metal glaze in the RS catalogue at the time.
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