<div dir="ltr"><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small">Andy,</div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small"><br></div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small"> There have been many iterations of the 888 but in all cases they retain the 8 pin chip where COS is picked up. I am attaching a photo from the howtos at <a href="http://hamvoip.org">hamvoip.org</a> showing the chip. There are two 8 pin chips and part numbers are often hard to find. One of them is the spot - pin 1. Placement of the chips changes so you will need to check which one it is. The COS goes high on signal - 0V no signal, >2.5V signal. If you cannot find a connection on the circuit side you will have to remove the board to get to the chip. Info on doing that is in the howto.</div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small"> <div dir="ltr"><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small"><br clear="all"></div><div><div class="m_5235792917855210793gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div><b><font size="4">73 Doug<br></font></b></div><b><font size="4">WA3DSP<br></font></b></div><b><font size="4"><a href="http://www.crompton.com/hamradio" target="_blank">http://www.crompton.com/<wbr>hamradio</a><br></font></b></div></div></div>
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<br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Sat, Aug 11, 2018 at 12:38 PM, "Andrew Hull KE8HEV via arm-allstar" <span dir="ltr"><<a href="mailto:arm-allstar@hamvoip.org" target="_blank">arm-allstar@hamvoip.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hello All,<br>
I'm in the process of building a simplex node (RA-40 & BF-888s).<br>
<br>
The BF-888s that I received has a date stamp on the board of 2017-11-04. I<br>
believe that this is an updated revision from the board that Chris Hood<br>
documents here:<br>
<a href="http://www.chrishoodblog.com/allstar-node-with-bf-888s-short-board/" rel="noreferrer" target="_blank">http://www.chrishoodblog.com/<wbr>allstar-node-with-bf-888s-<wbr>short-board/</a><br>
<br>
The design looks similar enough that the RX Audio, PTT, and Mic Audio<br>
appear to be in the same places. However, I'm at a loss for COS.<br>
<br>
Has anyone already solved the mystery for this revision? My Google attempts<br>
have turned up nothing.<br>
<br>
If not, could anyone offer some advice on how to find it myself? I consider<br>
myself in the "knows enough to be dangerous" category of low level<br>
electronics. So, with a friendly shove in the right direction, I hope I can<br>
find it.<br>
<br>
Here's a photo of my board. I haven't taken it off the heatsink to get a<br>
look at the other side.<br>
<a href="https://photos.app.goo.gl/pcnRfK2X7Pt8HhXKA" rel="noreferrer" target="_blank">https://photos.app.goo.gl/<wbr>pcnRfK2X7Pt8HhXKA</a><br>
<br>
Thank you!!<br>
<br>
73,<br>
Andy<br>
<br>
--<br>
Andy Hull<br>
KE8HEV<br>
<br>
[Any errors in spelling, fact, or tact are transmission errors]<br>
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</blockquote></div><br></div>