For me the context area isn't attenuated at all. I believe its 200Hz wide in the middle... The only difference I thought was that it can now go down to as narrow as 400 on the outer skirts rather than the 600 that it used to be limited to. Doesn't seem to make too much difference to me but I do admit that I like not being limited as I did run it at 600 at times and wished I wasn't being stopped.
I find that for me it may be a dumb idea to do something but I usually don't like not being allowed to. Thats one of the reasons why my 250Hz filter is fully allowed to be used in SSB on my K3. Not that I'd want to do that but why limit myself. ~Brett (KC7OTG) On Sat, 2008-08-30 at 18:50 -0400, Joe Subich, W4TV wrote: > > The magicians at Elecraft are now at work on an improved DUAL > > PB which will allow more flexibility in the context WIDTH > > setting, which would accomplish somewhat similar results (but > > the context BW is attenuated by -24 dB versus the focus BW). > > I've tried the updated context filter in beta 2.34. The problem > for me is that the context area is attenuated more than I would > like and the peak (50 Hz?) is a bit narrow. I would like to > try the transmit antenna on the subreceiver with a relatively > wide filter (600 - 1000 Hz) to get an idea of the overall > activity and a low noise (Beverage, K9AY, phased array, etc.) > receive antenna on the main antenna with a narrow (e.g. 200Hz) > filter to focus on the desired signal. > > 73, > > ... Joe, W4TV > > > > > -----Original Message----- > > From: [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED] On Behalf Of Bill W4ZV > > Sent: Saturday, August 30, 2008 12:21 PM > > To: elecraft@mailman.qth.net > > Subject: RE: [Elecraft] KRX3 questions > > > > > > > > > > > > Joe Subich, W4TV-3 wrote: > > > > > > > > > Bill, > > > > > >> I have 2.7k/1.8k/500/200 in my Main but > > >> only 2.7k/500 in the Sub. When I want to use diversity, I > > >> just remember to use a WIDTH which will auto-select either > > >> the 2.7k or 500. This way I can still use the 1.8k/200 for > > >> severe QRM situations in non-diversity and the 2.7k/500 for > > >> diversity and/or other situations. > > > > > > With some thought would it not be possible to get 500 and 200 Hz > > > filters with matched offsets so one could use bandwidth diversity > > > in addition to antenna diversity? I will not be able to try that > > > with my first K3 when that KRX3 arrives since the existing 500 > > > and 250 Hz filters have different offsets but I will look at the > > > 200 Hz filter in the second rig to see if it is close enough to > > > the -790 Hz (measured in radio #1, specified for radio 2) to be > > > useful. > > > > > > > Sure you could probably do that if the offsets between the > > 500 and 200 are > > not too far off. You'll probably want to set the 500 equal to the 200 > > rather than vice versa if they aren't identical (i.e. a shift > > in a 500 Hz BW > > is not as critical as the same shift in a 200). I'm not at > > home now but I > > recall my 500s are both -0.84 and my 200 is -0.91. If I > > wanted to try what > > you described I would set both 500s to -0.91 since a shift of > > 70 Hz is still > > not unreasonable in ~500 Hz total BW. > > > > The magicians at Elecraft are now at work on an improved DUAL > > PB which will > > allow more flexibility in the context WIDTH setting, which > > would accomplish > > somewhat similar results (but the context BW is attenuated by > > -24 dB versus > > the focus BW). > > > > 73, Bill > > > > > _______________________________________________ > 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
