> Its installed in the speaker outputs. That's a shame, It should be in the common feed to both the headphone and speaker amplifiers.
> I should take a look and see if the headphone > output had that 11-12khz stuff on it... Yes, it's coming out of the DSP DAC ... it's present on all three (headphone, speaker and line) outputs. 73, ... Joe, W4TV > -----Original Message----- > From: elecraft-boun...@mailman.qth.net > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Brett Howard > Sent: Friday, July 03, 2009 9:08 PM > To: Bob Cunnings > Cc: Elecraft > Subject: Re: [Elecraft] K3 Audio Low Pass Filter > > > Its installed in the speaker outputs. So it doesn't modify > the headphone circuits but I use it via speaker at home most > of the time... I should take a look and see if the headphone > output had that 11-12khz stuff on it... > > ~Brett > > On Fri, 2009-07-03 at 18:21 -0600, Bob Cunnings wrote: > > What is the point of insertion (in terms of the schematic) for this > > filter? > > > > Bob NW8L > > > > On Fri, Jul 3, 2009 at 6:09 PM, Brett > Howard<br...@livecomputers.com> > > wrote: > > > Its a low pass filter starting around 3.8Khz or so. I have some > > > before and after plots. I just need to get around to > posting them > > > so I can put them up on the reflector. > > > > > > On Fri, 2009-07-03 at 19:45 -0400, Mike Harris wrote: > > >> G'day, > > >> > > >> | All in all I'm quite pleased with the sound difference. > > >> | > > >> | ~Brett > > >> > > >> OK, that's couple of positive comments. Is there any technical > > >> data on the characteristics of this filter. For > example, does it > > >> in any way respond to the "pink" vs. "white" noise > thread of a few > > >> weeks ago. > > >> > > >> I've become rather more interested in this since > reactivating my K2 > > >> and running it side by side with the K3. The K2 sounds so much > > >> nicer even in the presence of a received S3 buzzy > background noise. > > >> If only the K2 power overshoot on 40M SSB didn't give my > amp a hard > > >> time... > > >> > > >> Now to put this in context, there was a huge improvement > in the K2 > > >> as soon as I installed the analogue af CW filter years > ago. In SSB > > >> mode the filter just introduces a low pass filter which > takes the > > >> hiss out of the audio and made it really smooth to listen to. > > >> > > >> I have played with the DSP bandwidth settings and > replicated the K2 > > >> af spectrum as displayed in Spectrogram to see if I can > make them > > >> sound the same but they don't. > > >> > > >> My agc and equalizer settings are nothing unusual or extreme. > > >> > > >> Regards, > > >> > > >> Mike VP8NO > > >> K2 #1400 > > >> K3 #345 ______________________________________________________________ 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
