You insist on making this an either/or kind of choice, and it simply is not. APF does not make a result in your brain, it simply listens to slower CW with a very narrow bandwidth. It seems to have times when it will pull something out of noise, and other times not, by use of the narrowness.
Diversity does not narrow what you hear. The randomness of noise causes it to spread around the audio "compass" while discrete signals will appear to come from a single direction, and signals going through fades will do a "rotation" at the bottom without actually losing copy. The spreading around of the noise is sometimes worth 10/15 dB of "separation" with whisper level signals in the clear, and undetectable in the monophonic, even with APF. With different kinds of noise, only the APF seems to work to pull out a signal. This and APF are not an either/or thing. I use one or the other, and rarely, both at the same time. If you can get a chance to listen to a K3 on diversity, you will understand. IF for some very silly reason I was forced to chose between APF and diversity, I would chose diversity, because of all the other uses of the excellent second RX. Go hear one. 73, Guy. On Tue, Jul 12, 2011 at 10:39 PM, callen1155 <[email protected]> wrote: > Thanks for the responses but I'm at a loss as to why the question is > confusing. I'm trying to determine the most efficient method to hear > weak/fading cw signals. > > I have read on here many times where folks brag on the 2nd receivers' > ability to overcome fading band conditions via diversity receive using > complementing antennas. I have read and experienced the benefit of APF under > those same band conditions as well. > > I understand diversity receive and APF go about it two totally different > ways but the end result is an improved ability to hear weak/fading signals. > > My question is simply, under weak/fading band conditions when you're > straining to copy the cw sig (assuming you have both APF and diversity > receive to choose from), which would you choose to improve your copy and > make the contact? > > thanks again. > chuck > > -- > View this message in context: > http://elecraft.365791.n2.nabble.com/KRX3-vs-APF-on-weak-signals-tp6577049p6577528.html > Sent from the Elecraft mailing list archive at Nabble.com. > ______________________________________________________________ > 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
