> 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: [email protected] > 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: [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
