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<p>I would go and read what's on Muffs about it.</p>
<p>With the original AS3320 there are issues with the PWM affecting
the frequency. To resolve the problem it seems people had to add
negative voltage regulator (think it's -5V if I remember
correctly).</p>
<p>Then CEM and new AS chips seem to be better.</p>
<p>Jay S.<br>
</p>
<div class="moz-cite-prefix">On 1/28/2021 10:46 AM, Tom Wiltshire
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:29494347-D78F-46E1-8050-EEC49B7E6593@electricdruid.net">
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<br style="font-family: Roboto, "Helvetica Neue",
Helvetica, Arial, sans-serif;" class="">
<span style="font-family: Roboto, "Helvetica Neue",
Helvetica, Arial, sans-serif;" class="">Does anyone have any
experience to offer having tried this? Are the old and new chips
close enough to be direct replacements? Or maybe with a bit of
trimming?</span><br style="font-family: Roboto, "Helvetica
Neue", Helvetica, Arial, sans-serif;" class="">
<br style="font-family: Roboto, "Helvetica Neue",
Helvetica, Arial, sans-serif;" class="">
<span style="font-family: Roboto, "Helvetica Neue",
Helvetica, Arial, sans-serif;" class="">There seems to have been
a lot of focus on the AS3340 as a replacement chip (and there
are a few little differences) but I haven’t seen or read much
about the AS3320 as a drop-in replacement.</span><br
style="font-family: Roboto, "Helvetica Neue",
Helvetica, Arial, sans-serif;" class="">
<br style="font-family: Roboto, "Helvetica Neue",
Helvetica, Arial, sans-serif;" class="">
<span style="font-family: Roboto, "Helvetica Neue",
Helvetica, Arial, sans-serif;" class="">Of course, changing all
the filters to maintain consistency is a possibility, and then
you have a few genuine CEMs for the next repair!</span><br
style="font-family: Roboto, "Helvetica Neue",
Helvetica, Arial, sans-serif;" class="">
<br style="font-family: Roboto, "Helvetica Neue",
Helvetica, Arial, sans-serif;" class="">
<span style="font-family: Roboto, "Helvetica Neue",
Helvetica, Arial, sans-serif;" class="">Thanks,</span><br
style="font-family: Roboto, "Helvetica Neue",
Helvetica, Arial, sans-serif;" class="">
<span style="font-family: Roboto, "Helvetica Neue",
Helvetica, Arial, sans-serif;" class="">Tom</span><br
style="font-family: Roboto, "Helvetica Neue",
Helvetica, Arial, sans-serif;" class="">
<br style="font-family: Roboto, "Helvetica Neue",
Helvetica, Arial, sans-serif;" class="">
<span style="font-family: Roboto, "Helvetica Neue",
Helvetica, Arial, sans-serif;" class="">==================</span><br
style="font-family: Roboto, "Helvetica Neue",
Helvetica, Arial, sans-serif;" class="">
<span style="font-family: Roboto, "Helvetica Neue",
Helvetica, Arial, sans-serif;" class=""> Electric Druid</span><br
style="font-family: Roboto, "Helvetica Neue",
Helvetica, Arial, sans-serif;" class="">
<span style="font-family: Roboto, "Helvetica Neue",
Helvetica, Arial, sans-serif;" class="">Synth & Stompbox DIY</span><br
style="font-family: Roboto, "Helvetica Neue",
Helvetica, Arial, sans-serif;" class="">
<span style="font-family: Roboto, "Helvetica Neue",
Helvetica, Arial, sans-serif;" class="">==================</span>
<br>
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