<div dir="ltr"><div class="gmail_default" style="font-family:"comic sans ms",sans-serif;font-size:small">I have several of these fobs. CM108 and open to mods.</div><div class="gmail_default" style="font-family:"comic sans ms",sans-serif;font-size:small"><br></div><div class="gmail_default" style="font-family:"comic sans ms",sans-serif;font-size:small"><span style="color:rgb(64,64,64);font-family:Roboto,arial,sans-serif;font-size:13px;line-height:18.2px">Looking at the board carefully, it looks like the mic tip and ring are wired together and removing 0-Ohm chip resistor R6 opens the 4V mic Vbias line from CM108 pin 25, leaving mic T+R pins connected to CM108 MICIN pin 27 through a chip cap. Mic T-R pads are on J3 on the red LED side of the board if the jacks are removed.I just confirmed R6 does indeed remove the 4.5V mic bias.</span></div><div class="gmail_default" style="font-family:"comic sans ms",sans-serif;font-size:small"><br></div><div class="gmail_default" style="font-family:"comic sans ms",sans-serif;font-size:small">Duane KA1LM</div><div class="gmail_default" style="font-family:"comic sans ms",sans-serif;font-size:small"><br></div><div class="gmail_default" style="font-family:"comic sans ms",sans-serif;font-size:small"><a href="http://www.ebay.com/itm/Wholesale-USB-External-7-1-Channel-3D-Virtual-Audio-Sound-Card-Adapter-PC-Laptop/321869728763?_trksid=p2047675.c100011.m1850&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D37182%26meid%3Dc01ddad9c6324b2ab0a861086fa54171%26pid%3D100011%26rk%3D1%26rkt%3D3%26sd%3D291156304476">http://www.ebay.com/itm/Wholesale-USB-External-7-1-Channel-3D-Virtual-Audio-Sound-Card-Adapter-PC-Laptop/321869728763?_trksid=p2047675.c100011.m1850&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D37182%26meid%3Dc01ddad9c6324b2ab0a861086fa54171%26pid%3D100011%26rk%3D1%26rkt%3D3%26sd%3D291156304476</a></div><div class="gmail_default" style="font-family:"comic sans ms",sans-serif;font-size:small"><br></div><div class="gmail_default" style="font-family:"comic sans ms",sans-serif;font-size:small"><br></div></div>