<html><head></head><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue-Light, Helvetica Neue Light, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div id="yui_3_16_0_1_1453498238334_10348"><span id="yui_3_16_0_1_1453498238334_10425">Try using an oscilloscope across the cartridge output when talking.</span></div><div id="yui_3_16_0_1_1453498238334_10348"><span><br></span></div><div id="yui_3_16_0_1_1453498238334_10348"><span><br></span></div><div></div><div id="yui_3_16_0_1_1453498238334_10349"> </div><div class="signature" id="yui_3_16_0_1_1453498238334_10424">Glen, K9STH </div><div class="signature" id="yui_3_16_0_1_1453498238334_10424"><br></div><div class="signature" id="yui_3_16_0_1_1453498238334_10424">Website: http://k9sth.net</div><br> <div class="qtdSeparateBR" id="yui_3_16_0_1_1453498238334_10423"><br><br></div><div class="yahoo_quoted" id="yui_3_16_0_1_1453498238334_10420" style="display: block;"> <div style="font-family: HelveticaNeue-Light, Helvetica Neue Light, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1453498238334_10419"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1453498238334_10418"> <div dir="ltr" id="yui_3_16_0_1_1453498238334_10417"> <font size="2" face="Arial" id="yui_3_16_0_1_1453498238334_10422"> <hr size="1" id="yui_3_16_0_1_1453498238334_10421"> <b id="yui_3_16_0_1_1453498238334_10478"><span style="font-weight:bold;" id="yui_3_16_0_1_1453498238334_10477">From:</span></b> Ron Kramer <kd6edv@gmail.com><br> <b id="yui_3_16_0_1_1453498238334_10480"><span style="font-weight: bold;" id="yui_3_16_0_1_1453498238334_10479">To:</span></b> ChrisIwata--- via Heath <heath@puck.nether.net> <br> <b><span style="font-weight: bold;">Sent:</span></b> Friday, January 22, 2016 12:42 PM<br> <b><span style="font-weight: bold;">Subject:</span></b> [Heath] HDP-242 Microphone<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_1_1453498238334_10481"><br>Two questions:<br><br>Is there a way to test the microphone element to see if it works?<br><br>Mine is missing the impedance transformer on the low/high switch. Does anyone have one or info to roll my own?<br><br></div> </div> </div> </div></div></body></html>