"What will happen if pins 5 (chassis Gnd) and 7 (mic ground) are connected together?"
A temporal rift will occur swallowing the entire universe down to a singularity point. The mother of all black holes. Seriously, the audio will distort. There are mic (+) and mic (-) pins on the connector. Mic(-) should *not* be tied to ground (pin 5). I am purposely not calling mic(-) or pin 7 "mic ground", because it isn't at ground potential. This is the classic "pin 1 problem. The mic cable shield will pick up RF and if that is connected to mic(-) it will be coupled into the audio circuitry creating noise.. -Tim -----Original Message----- From: flexradio-boun...@flex-radio.biz [mailto:flexradio-boun...@flex-radio.biz] On Behalf Of Jerry Gardner Sent: Wednesday, December 22, 2010 4:55 PM To: Ray - K9DUR Cc: FlexRadio@flex-radio.biz Subject: Re: [Flexradio] Heil Adapter for 5000A > > The Yaesu (Yellow) adapter. Be careful, not all Heil adapters are > created equal. On the Flex, pin 5 (PTT/Shield Ground) and pin 8 (mic > ground) are separate. On Yeasu radios they are not, so the Heil > adapters vary as to what pins are wired and which are not. I was > lucky -- the adapter I use with my Heil ProSet Plus headset is wired > properly for use with my FLEX-5000A. > I assume you mean pin 7 for mic ground, not pin 8? What will happen if pins 5 (chassis Gnd) and 7 (mic ground) are connected together? Someone else mentioned that the cable shield has to be connected to the body of the Foster connector. What is the purpose of this? I'm currently using a Shure 444D mic with the cable shield not connected to the body of the connector and it works fine. _______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/ _______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/
