Evert - I haven't noticed that with mine. It just seems like a nice, linear reduction in bandwidth.
I thought the sound of the 1.8 bandwidth was much nicer with the actual 1.8 filter + 1.8 DSP than the 2.8 filter + 1.8 DSP. 73, Steve NN4X On Wed, May 21, 2008 at 5:57 PM, Evert Bakker (PA2KW) <[EMAIL PROTECTED]> wrote: > Hello all, > > > > Today I received the 1.8 Kc 8 pole filter and installed it tonight. > > I did the configuration with the software tool used for firmware updates as > well (also performed an update as well). > > All went OK, but I do have a feeling something is wrong or my ears/brains > work a little different from the majority (yeh yeh I know...) > > When XFil 2.7 is selected together with the DSP at 2.7 Kc, the audio sounds > great. When decreasing the BW with the DSP to 1.8 (but keeping the centre > the same), the hardware filter is switched in at 1.8 Kc DSP setting. During > the decreasing process I'm loosing "information" (Ofcourse!) but my feeling > says too much. When during the decreasing process I also lower the centre > freq, the excessive loss of "information" is compensated. This gives me the > feeling as if the filter isn't centered anymore. > > First I thought this might have to do something with the Offset (-0.91 for a > 2.7 5 pole filter) but nothing was written on the 1.8 Kc 8 pole filter. I > just tried it, but that didn't compensate the excessive loss. > > > > During a process of decreasing bandwidth while listening to an SSB signal, I > would appreciate if a shift of the centre-freq of the DSP is not required > > > > _______________________________________________ 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
