The mic jack on the RP is a stereo jack. You should use a stereo plug with audio on the tip and ground on the sleeve...nothing on the ring.
73 Greg AB7R -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Dale LeStourgeon Sent: Wednesday, February 06, 2008 5:23 PM To: [EMAIL PROTECTED] Cc: elecraft Subject: Re: [Elecraft] K3: computer headset connection [EMAIL PROTECTED] wrote: > I'm looking for information on connecting a computer headset's boom mic to the K3 rear mic jack. I've read through the archives, but it seems the messages either refer to making connections via the front jack (with its discrete pins available), or just, "I plugged it in & it worked." I don't have my K3 yet to test with. My following questions are based on the scenario that just plugging it in doesn't work. > > My mic plug is stereo, so I'm assuming its an electret. The K3's jack is mono, but apparently has a bias voltage available via the menu. I'd like to build a "dongle" (short adapter cable) to interface the mic with the jack. To preserve the headset, I don't want to modify its plug or cable. > > Does the bias voltage appear on the tip of the K3's jack? One archived message indicated that at least some computer mics have both the ring & tip connected together; I'm at work now & can't test mine. Would I add a resistor across the tip & ring lines, and add a small capacitor in-line from the K3's jack tip to the mic's tip to block DC? > > Sorry for what may be a painfully obvious set of questions, but I've never connected anything but a regular mic to a rig before. I plan on using the rear jacks to keep unnecessary cables from cluttering up the front of the rig. > > 73, > > Mike > KW1ND > _______________________________________________ > Elecraft mailing list > Post to: Elecraft@mailman.qth.net > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com > > Mike, I could not find out from the manual how the rear mic jack is configured ( whether bias is on tip or ring) but I just plugged in a computer mic and it works fine; and I am using a PTT foot switch. Perhaps it was just luck that the computer mic had the same setup as the K3 mic jack. It would still be nice to know how the K3 mic jack is configured for tip/ring/sleeve. Getting good audio reports with the computer mic. Dale K5AJZ _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
