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<p>Considering that some SMT caps are not marked and many of the
smaller SMT resistors aren't marked either .. is it really that
much of a surprise? Because of the ceramic SMTs not being marked
we all have to develop the discipline to keep track of the parts.
You can't just drop a strip of caps on the bench; you have to put
it back in the marked bag/box/whatever. Since we all can do that,
we can certainly do that for resistors as well.</p>
<p>As for repairs, shucks, I dunno. Make it all open source? Ask
someone with the same device to measure R38 because yours is
burned up? Come to think of it, if a PTH resistors burns hard
enough you may not be able to read the codes anyway.</p>
<p>I used to eschew 0603s because they were not marked. Maybe I was
being silly...</p>
<p>--TimR<br>
</p>
<br>
<div class="moz-cite-prefix">On 4/2/2018 11:39 AM, Roman wrote:<br>
</div>
<blockquote type="cite"
cite="mid:fee5a91e1ad942148fde02f53feef401@grupawp.pl">
<div>As someone have predicted it not so long ago on this list,
it's already happening.<br>
</div>
<div>Vishay will not be putting any marking on their general
purpose standard resistors, even the largest ones.<br>
</div>
<div><br>
</div>
<div>"The marking of Vishay’s standard R-chips in the 0603 to 2512
case sizes — i.e. CRCW0603 – CRCW2512 with TCR of ± 200 ppm/K /
5 %, TCR of ± 100 ppm/K / 1 %, and TCR of ± 200 ppm/K / 1 %, 0.0
Ω — will be discontinued to improve the efficiency of the
production process. Reel labels will enable product
identification as before, and part numbers will not be changed.
There will be no impact to the products’ performance or
technical and environmental specifications (except the
marking)."<br>
</div>
<div><br>
</div>
<div>Later they explain that various marking styles common today
are only causing problems by fooling AOI and that no marking is
actually better obviously.<br>
</div>
<div><br>
</div>
<div>So anything better than 1% and 100ppm will be still marked
hopefully, at least for couple of years.<br>
</div>
<div>The other makers will follow soon I guess.<br>
</div>
<div>It would be good April Fools message if it was not a letter
from March 28th.<br>
</div>
<div><br>
</div>
<div>Roman<br>
</div>
<br>
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</pre>
</blockquote>
<br>
<pre class="moz-signature" cols="72">--
--Tim Ressel
Circuit Abbey
<a class="moz-txt-link-abbreviated" href="mailto:timr@circuitabbey.com">timr@circuitabbey.com</a></pre>
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