OK, guys, here is the real skinny, from the schematics: As shown on the K3 Block Diagram (6/6/07), The DSP RX section provides a two channel AUX AF Out to the KIO3 board. This stereo signal is transformer coupled (see KIO3 Main - Sheet 3) to the Audio IO Board. The KIO3 - Audio Board does indeed show a stereo LINE OUT with the LINEJACK_R on the ring and LINEJACK_L on the tip. The input side of the audio transformers on the KIO3 board have series 600 ohm resistors. Thus it is possible to short the ring to the ground (which worst case could happen even by using a stereo cable between the K3 and a mono Line In or Mic In on a computer, depending on the computer input circuitry and if the computer and K3 grounds are connected). But, due to the transformer coupling in the KIO3, you won't hurt the K3. (Probably) :-)
Cheers, Fred Fred Cady fcady at ieee dot org > -----Original Message----- > From: Don Wilhelm [mailto:w3...@embarqmail.com] > Sent: Thursday, January 15, 2009 8:03 AM > To: Cady, Fred > Cc: elecraft@mailman.qth.net > Subject: Re: [Elecraft] K3 Psk audio connections > > Fred, > > No worries, see my posting on the Elecraft reflector at 8:09 > this morning. > > 73, > Don W3FPR > This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This message contains confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this e-mail. _______________________________________________ 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
