On Wed, 23 Dec 2009 16:56:44 -0800, K6LE wrote: >It's a stereo plug
No, it's not a "stereo" plug, it's a 3-circuit plug the CAN be used for stereo, or can be used for other things like an electret mic. It could also be used to carry shielded balanced audio wiring. With this mic, the tip is audio high, the sleeve is audio return and cable shield, and the ring is +Vdc to power the tiny impedance converter inside the mic. For more on this, see http://audiosystemsgroup.com/HamInterfacing.pdf and the Appendix on audio for ham radio in http://audiosystemsgroup.com/RFI-Ham.pdf 73, Jim K9YC ______________________________________________________________ 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
