Don Wilhelm wrote: > Supposedly, the 8 pole filters do not have to be matched (they do not > have offset numbers associated with them), but in practice, they may > have a small offset and some ''tweaking" of the offset values may be > required to eliminate the "wush, wush" sound when using diversity.
For what it's worth, I have only a 2.8 kHz filter in my KRX3, and 2.8, 1.0 and 0.4 kHz filters in my main receiver. Offsets are 0. I use diversity a lot and haven't had any problems. Normally I have the bandwidth adjusted to 400 Hz or less when trying to work weak CW signals. I often find that intelligibility is improved with diversity (on 40 meters I use a dipole as the main antenna and a vertical as the second rx antenna). It's hard to describe, but the signal seems to stand out better. It might be due to the reduction in QSB gained by polarization diversity, or something else, having to do with noise. I'm not sure. On 160 I use a 200' wire thrown on the ground as the second rx antenna (main is a vertical). There is some improvement, but nothing like 40. On 20, I have a 4-el tribander at 40'. It is *always* better than the vertical by many dB, so I don't bother with diversity. -- 73, Vic, K2VCO Fresno CA http://www.qsl.net/k2vco ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
