<div dir="auto">Or better, pulling the schematic of these modules and remaking it in a nice, thick fr-4 board with precision resistors/caps.<br><br><div data-smartmail="gmail_signature">Enviado do meu Tele-Movel</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Nov 29, 2017 7:59 PM, "Luís Marka" <<a href="mailto:luis.marka@terra.com.br">luis.marka@terra.com.br</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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Actually the chips themselves should be fine even in bad 80017A
modules. What seems to happen is that over time the epoxy material
reacts with the material used for the printed resistors deposited on
the ceramic substrate, causing corrosion, and this corrosion leads
to noisy modules. It should be possible to fix a module by cutting
out the corroded portion(s) and soldering SMD resistors in their
place.<br>
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<div>I always thought that the epoxy on the voice modules is
causing overheating and that is what causes the slow death
of the rare unobtaniums custom ICs underneath.</div>
<div><br>
</div>
<div>I'm still investigating on this, probably after
restoring </div>
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<div class="gmail_quote">2017-11-29 20:05 GMT+01:00 MTG <span dir="ltr"><<a href="mailto:grant@musictechnologiesgroup.com" target="_blank">grant@musictechnologiesgroup.<wbr>com</a>></span>:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">It would
be nice to find out what the definitive "fix" is for these,
aside from replacement. I've seen discussions talking about
arbitrary acetone soaking. Other ones discussing the length
of time depending on the date code, and yet another
discussing that it's not the acetone at all, it's the board
level resoldering you have to do afterward.<br>
<br>
I have an MKS30 waiting for me.
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<br>
On 11/29/2017 10:53 AM, NSSINC wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
I like fixing stuff. I like the Juno-106. But I
have grown tired of fixing my brother's 106 every few
months. We don't even bother calibrating it anymore.<br>
<br>
So I'm looking for list members opinions of this
guys replacement filter chips:<br>
<br>
<a href="http://www.analoguerenaissance.com/AR80017A/" rel="noreferrer" target="_blank">http://www.analoguerenaissance<wbr>.com/AR80017A/</a><br>
<br>
And if anyone in the US has opinions on weather
it's better to order direct or from Syntaur.<br>
<br>
<br>
Thanks!<br>
<br>
-Al<br>
<br>
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