[bars] Fw: [cca] A caution regarding replacing carbon resistors: Use Allen-Bradley -- if you can find them.

[Tony Brock-Fisher]

I think what happens is they absorb moisture over the years, which makes 
the substrate material expand, resulting in resistance values 
increasing. A gentle baking might bring them back into spec - but for 
how long would be anyone's guess. Put 'em in your boat anchors and keep 
them warmed up on a frequent basis...

-Tony, K1KP

On 1/5/2024 3:54 PM, Steve Wedge, W1ES/4 via bars wrote:
> Interesting article about "olde tech".
>
> I still have parts cabinets stuffed to the top with these and I test 
> the entire drawer when I need to take one for a repair.  A lot of the 
> really, really old ones have drifted way beyond even their generous 
> 10% tolerances of their day.  A surprising number of them are still 
> good, though.
>
> Steve Wedge, W1ES/4
>
> Time flies like an arrow.  Fruit flies like a banana.
>
> Sent with Proton Mail <https://proton.me/> secure email.
>
> ------- Forwarded Message -------
> From: James Beitchman <jbeitchman at jgbconsult.com>
> Date: On Friday, January 5th, 2024 at 1:36 PM
> Subject: [cca] A caution regarding replacing carbon resistors: Use 
> Allen-Bradley -- if you can find them.
> To: cca at groups.io <cca at groups.io>
>
>> https://www.edn.com/carbon-composition-resistors/?utm_source=newsletter&utm_campaign=link&utm_medium=EDNFunFriday-20240105&oly_enc_id=9352C0934023D3T 
>> <https://www.edn.com/carbon-composition-resistors/>
>>
>> See this interesting article about Allen-Bradley and IRC carbon 
>> resistors.
>>
>> 73,
>>
>> Buzz
>>
>> W3EMD
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