Steve-- I tried just inserting a bare plug into the jack, with no microphone wires attached and measured no bias voltage on the rear jack. One of my first thoughts was that the microphone had a short in it, but, that was not the case.
Thanks for the suggestion. Paul Alexander wb9ipa On Sun, Apr 26, 2009 at 9:11 PM, Steve Ellington <[email protected]> wrote: > Paul > If you unplug that mic from the rear panel jack, can you measure any bias > v.? I use a computer mic on the RP with bias set for rP.H BIAS. > Steve Ellington > [email protected] > ----- Original Message ----- From: "paul alexander" <[email protected]> > To: <[email protected]> > Sent: Sunday, April 26, 2009 8:54 PM > Subject: [Elecraft] K3 Rear Panel Microphone Jack Bias Voltage > > >> I recently assembled my K3 and am having some trouble getting a >> microphone to operate. All of my station microphones are Motorola >> handheld microphones. These are dynamic microphones which have a >> built-in amplifier, to make them appear as carbon microphones. As >> such, they require bias voltage. >> >> My first attempt was to connect the microphone via the rear panel >> jack, using the following menu settings: >> Mic SEL >> rPL.bIAS >> and >> MIc + LIn >> On >> >> Under these settings, I get no bias voltage on the rear panel microphone >> jack. >> >> When I set Mic SEL for FPL.bIAS, I get bias voltage on the front >> panel, and a microphone connected to the front panel connection works >> as expected. >> >> FYI, the radio Serial Number is 2925 and the firmware is version 1.98, >> MAR 31, 2009. >> >> Is it not possible to get microphone bias voltage on the rear panel >> connector? Do I have something set up incorrectly? >> >> Any suggestions would be appreciated. >> >> Thank-you >> >> Paul Alexander >> wb9ipa >> ______________________________________________________________ >> 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
