That “ideal curve” assumes an LC receive filter with a roll off on the high (and low) frequencies. That peak is a pre-emphasis on the high end to correct for the receive filters. Modern crystal filters and FIR filters don’t have that roll off, so it is not needed.
Maybe it works for your own voice and that’s great. But it is a choice, not a standard setting. wunder K6WRU Walter Underwood CM87wj http://observer.wunderwood.org/ (my blog) > On Nov 9, 2016, at 8:04 PM, Ron D'Eau Claire <r...@cobi.biz> wrote: > > I will certainly support Matt's suggestions. They are what has been found > the most effective and natural sounding since the 1930's! The famous Astatic > D-104 mic had this response curve built into its Rochelle Salts crystal > element design. > > A real disadvantage with modern electret elements is that they have a > response curve far too great for optimal "communications" quality. > > The ideal curve used by Astatic for their D-104 is shown here. > > http://www.radiomanual.info/schemi/ACC_microphone/Astatic_TUP9-D104SE_Silver > _Eagle_user.pdf > > Note the gradual peak up around 4 kHz. And as Matt noted, you may want to > roll off the low end higher than shown since the energy in that range is > wasted at best and can result in "muddy" reports in some cases. That all > depends upon the receiver at the other end. But the less RF power you use to > transmit tose low frequencies the more you will be putting out in the key > speech range. > > 73, Ron AC7AC > > -----Original Message----- > From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Matt > Zilmer > Sent: Wednesday, November 9, 2016 1:36 PM > To: elecraft@mailman.qth.net > Subject: Re: [Elecraft] KX3 Transmit EQ Settings > > Best is to eliminate the low (50, 100, 200 Hzbands). These contribute > nothing to intelligibility, and the MH3 has frequency response below 400 Hz, > so you'd just be wasting energy because of this. With the low bands at 0dB, > I got reports of muddy audio. > > I would also suggest a mid-band boost, say at 1.6 and 2.4 KHz, of 3 to 5 dB. > This will assist intelligibilityin general. > > I'm using these settings on a K3, KX3, and on a KX2 with different > microphones, and all of them produce excellent voice audio as reported > on-air. > > 73, > > matt W6NIA > > > On 11/9/2016 1:28 PM, k4mmg....@gmail.com wrote: >> Any suggestions on what EQ settings for good SSB communication using the > Elecraft hand mic? >> >> Any suggestions on what EQ settings for good SSB communications using any > other type of mike? >> >> I am not seeking any fancy audio profile. >> ______________________________________________________________ >> 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 Message delivered to >> mzil...@roadrunner.com > > -- > Always store beer in a dark place. - R. Heinlein > > Matt Zilmer, W6NIA > [Shiraz] > > ______________________________________________________________ > 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 Message > delivered to r...@elecraft.com > > ______________________________________________________________ > 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 > Message delivered to wun...@wunderwood.org ______________________________________________________________ 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 Message delivered to arch...@mail-archive.com
