You are right Jay. Bands 1 and 2 do nothing. There's nothing to reduce! Steve Ellington n...@carolina.rr.com ----- Original Message ----- From: "Jay Bromley" <jayw5...@gmail.com> To: <li...@subich.com>; "'Roy Morris'" <w4...@carolina.rr.com>; <elecraft@mailman.qth.net> Sent: Monday, April 06, 2009 7:47 PM Subject: Re: [Elecraft] K3 Hissy and Noisy Audio
> Hi Joe, > Looking at Spectra right out of the Phones output, I don't see where bands > 1or 2 do all that much in lowering K3's bass. > > Having the rig on SSB using the 2.7 Khz filter, the "Lo" on 0, I see no > change on bands 1 and 2 when I set them to -16. What I am missing here? > I > have never seen or heard too much bass in the K3. > > I did a plot at 0 dB, one at -16 on band 1 and another one on -16 on band > 2 > if anyone would like to see them. > > 73 de w5jay/jay.. > > > >> >>> Perhaps NR could also be improved with more low >>> frequencies in the passband. >> >> Please NO! I already run RX Audio bands 1 and 2 at -16 dB to >> eliminate excessive bass - no more bass, please! >> >> The hiss many seem to be complaining about is broadband noise >> in the audio (speaker) and/or headphone amplifier. It is more >> noticeable when driving low impedance loads (8/16 Ohm) due to >> the relatively high gain (14 dB) of the speaker amplifier >> and the high frequency boosting effect of the 33 pF capacitors >> in parallel with the gain setting (feedback resistors). >> >> 73, >> >> ... Joe, W4TV >> >> >> >> >>> -----Original Message----- >>> From: elecraft-boun...@mailman.qth.net >>> [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Roy Morris >>> Sent: Monday, April 06, 2009 2:01 PM >>> To: elecraft@mailman.qth.net >>> Subject: [Elecraft] K3 Hissy and Noisy Audio >>> >>> >>> I concur with what has been said regarding the "hissy" audio. >>> The receiver audio seems to be on the mid-range to high >>> frequency side without enough low frequencies in the >>> passband. Experiments with RX EQ apparently have not done >>> anything to eliminate this hiss, but maybe the firmware can >>> be adjusted to increase the low-end response of the receiver >>> passband. If this doesn't work, maybe a component change is in order. >>> >>> I also think the noise reduction is too sharp in both SSB and >>> CW. Perhaps NR could also be improved with more low >>> frequencies in the passband. >>> >>> Roy Morris W4WFB >>> K2 #2225 >>> K3 #323 >>> K3 #2810 >>> ______________________________________________________________ >>> 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 >> >> ______________________________________________________________ >> 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 > > ______________________________________________________________ > 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 ______________________________________________________________ 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
