Jim, Unless one is using diversity with phase locked signals, adding the uncorrelated noise from one receiver to the signal from the other receiver reduces the overall s/n. While you may think my use of the term "pollution" is unnecessarily negative, it is an accurate description.
Assuming equal volume settings and equal bandwidths in the two receivers, the S/N will degrade by 6 dB (twice the noise voltage). If one is listening to a desired DX station with a low noise antenna and the pile-up with a wider filter and a noisy transmit antenna, the S/N will be degraded even more. The K3 receivers are better isolated that other "dual receiver" transceivers. It would be a shame to degrade S/N by adding a mix control when it is relatively easy to do so externally or those who don't mind the hit in S/N. 73, ... Joe, W4TV > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Dr. > James C. Garland > Sent: Sunday, November 16, 2008 12:19 PM > To: [email protected] > Subject: RE: [Elecraft] K3: listening to both rcvrs > > > Joe, > Your comment strikes me as unnecessarily negative. (Pollute? > Crosstalk?) I thought Fred's suggestion, coming as it does > from a very experienced CW contester, makes a lot of sense. > > 73, > > Jim W8ZR > > > -----Original Message----- > > From: [EMAIL PROTECTED] [mailto:elecraft- > > [EMAIL PROTECTED] On Behalf Of Joe Subich, W4TV > > Sent: Sunday, November 16, 2008 10:09 AM > > To: 'cloud runner'; 'Elecraft Reflector' > > Subject: RE: [Elecraft] K3: listening to both rcvrs > > > > > > If you must pollute the audio from one receiver with audio from the > > other receiver, add a 5 to 10K pot between the tip and the ring of > > your headphones and adjust it for the level of pollution you need. > > > > There is no need for Wayne (or probably Lyle) to design > crosstalk into > > the DSP process. > > > > 73, > > > > ... Joe, W4TV > > > > > > > > > > > -----Original Message----- > > > From: [EMAIL PROTECTED] > > > [mailto:[EMAIL PROTECTED] On Behalf Of > cloud runner > > > Sent: Sunday, November 16, 2008 11:03 AM > > > To: [email protected] > > > Subject: [Elecraft] K3: listening to both rcvrs > > > > > > > > > for what it may be worth... > > > > > > For my pair-of-K2's in SO2R, I have routed the audio in > such a way > > > that I have a balance control with the audio from the two > radios. I > > > call it a mixing control. I find that "optimum" is achieved when > > > the full strength audio is in one ear, and that same audio is > > > present, but weak in the other ear. I reason that when the audio > > > goes to one ear only, the content must get to the other > hemisphere > > > of the brain within brain circuitry. When it is routed to both > > > ears, now both hemispheres get the information for > interpretation at > > > the same time. Making it strong in one ear and weak in the > > > other, reversed for the other channel, lets me know which > > > rcvr I am hearing, while brain interpretation is at full speed. > > > > > > and so, Wayne... > > > > > > I think that there must be a firmware way either by routing to a > > > panel pot, or probably more simply in a menu, by which > the operator > > > can select either complete channel isolation, or both channels to > > > both ears, but with one ear X DB down from the other. (I > can't say > > > how much down is best,but I find that it is enough when I > can barely > > > notice it. All of a sudden copy is MUCH easier). Give > it a thought > > > because of the above, I, at least, am quite convinced > after a lot of > > > usage with a pair of K2's in SO2R, that is a much better > > > arrangement for copying CW from the two channels. > > > > > > with much appreciation for this fine radio, > > > > > > 73, Fd - KT5X > > > > > > K2 # 0700 > > > K3 # 0144 > > > > > > > _______________________________________________ > > Elecraft mailing list > > Post to: [email protected] > > 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: [email protected] > 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: [email protected] 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
