<html><head></head><body><div class="ydp1faf1303yahoo-style-wrap" style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:16px;"><div></div>
        <div dir="ltr" data-setdir="false">Photo at: <a href="https://myplace.frontier.com/~jspeth/A20G545.JPG" rel="nofollow" target="_blank">https://myplace.frontier.com/~jspeth/A20G545.JPG</a></div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">I should have posted this pic first. The date code accurately indicates when I built it: 1983. So anything with origins past that date are not valid. </div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">Thanks - JJS</div><div><br></div>
        
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                    On Sunday, June 19, 2022, 06:05:02 AM PDT,  <synth1@airmail.net> wrote:
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                <div><div dir="ltr">I'm pretty good at this if I can SEE a photo.<br clear="none"><br clear="none">Paul S.<br clear="none"><br clear="none"><div class="ydpc5c06ad5yqt4420371054" id="ydpc5c06ad5yqtfd79082"><br clear="none">-----Original Message-----<br clear="none">From: Synth-diy <<a shape="rect" href="mailto:synth-diy-bounces@synth-diy.org" rel="nofollow" target="_blank">synth-diy-bounces@synth-diy.org</a>> On Behalf Of brianw<br clear="none">Sent: Sunday, June 19, 2022 3:16 AM<br clear="none">To: John Speth <<a shape="rect" href="mailto:johnspeth@yahoo.com" rel="nofollow" target="_blank">johnspeth@yahoo.com</a>><br clear="none">Cc: SDIY <<a shape="rect" href="mailto:synth-diy@synth-diy.org" rel="nofollow" target="_blank">synth-diy@synth-diy.org</a>><br clear="none">Subject: Re: [sdiy] A20G545 chip, what is it?<br clear="none"><br clear="none">My first guess was a 74x545 octal bidirectional transceiver, non-inverting.<br clear="none">They're 20-pin.<br clear="none"><br clear="none">However, that doesn't seem to fit on a SSM voice card (or into an 18-pin<br clear="none">package).<br clear="none"><br clear="none">Brian<br clear="none"><br clear="none"><br clear="none">On Jun 18, 2022, at 7:59 PM, John Speth wrote:<br clear="none">> Today I was dumping old circuit boards that I built many years ago. I was<br clear="none">stripping valuable parts from one and I found two 18 pin DIPs that are<br clear="none">marked "A20G545" on one line and "MCE 8211" on the line below it. 8211 is<br clear="none">the date code (1982). The other markings are a mystery. Searching for this<br clear="none">chip online was a dead end for me. Does anybody know what it could be? It<br clear="none">was from a board that contained an SSM 2012 VCA and an SSM 2044 VCF. I've<br clear="none">lost the schematics. It was my design.<br clear="none">> <br clear="none">> Thanks - JJS</div><br clear="none"><br clear="none"><br clear="none">_______________________________________________<br clear="none">Synth-diy mailing list<br clear="none"><a shape="rect" href="mailto:Synth-diy@synth-diy.org" rel="nofollow" target="_blank">Synth-diy@synth-diy.org</a><br clear="none"><a shape="rect" href="http://synth-diy.org/mailman/listinfo/synth-diy" rel="nofollow" target="_blank">http://synth-diy.org/mailman/listinfo/synth-diy</a><br clear="none">Selling or trading? Use <a shape="rect" href="mailto:marketplace@synth-diy.org" rel="nofollow" target="_blank">marketplace@synth-diy.org</a><div class="ydpc5c06ad5yqt4420371054" id="ydpc5c06ad5yqtfd21192"><br clear="none"><br clear="none"></div></div></div>
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