Dick - Avoid all the adapter cruft and plug the headset into the rear panel. Nothing hanging off the front panel to snag stuff. Set Menu|Mic Sel to rP.h, and turn the bias on.
73, Mike NF4L On 3/8/2012 3:16 PM, Richard Fjeld wrote: > For the benefit to others like myself, this is a follow-up to the post below. > > I have been re-using an adapter made for another radio&headset-mic with my > CM-500 mic. What I didn't know is that there was a 22k resistor in the > adapter that bridged the 8V to the tip and ring which were wired common. > > I have to admit to being ignorant of how the bias worked. I had thought the > 8V on pin 6 would be controlled by the menu option. Everything was fine > until I wanted to try using a Dynamic mic with the same lashup. > > As for the CM-500, I'd like to know if it is the tip, or ring, on the 1/8 > inch plug that is the actual mic audio lead. I will have to try one, or the > other, to see. If anyone else has done this, please let me know. It would be > nice if mic plugs were standardized. Maybe the new ones are, but I don't know > what it is. > > Thanks, > Dick, n0ce > > > > I bought a CM-500 less than a year ago. A few days ago, I was trying > things, and I turned off the bias, and the mic still works as if, no change. > I tried testing without tearing things apart, and I think the bias is still > on. > > > > 73, > > Richard Fjeld, n0ce > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
