Thanks Don. The published curves ( https://elecraft.com/pages/k3s-8-215-mhz-first-if-crystal-filter-response-curves <https://elecraft.com/pages/k3s-8-215-mhz-first-if-crystal-filter-response-curves> ) suggest that there will be significant low end rolloff below 300 Hz. But I have not taken the time or effort to attempt to measure it myself. I believe that the ESSB improvements also require a wider filter to be totally effective.
The reason I ask is that when on-the-air testing of my new HyperX Cloud Pro headset there was not much change (none actually) noticed when I rolled 50Hz. And 100Hz. off to -16. I thought that I had seen actually measurements of the actual rolloff in the past and thought that someone might recall where there were. Very 73 - Mike - K9JRI > On Dec 25, 2018, at 11:18 AM, Don Wilhelm <[email protected]> wrote: > > Michael, > > I think the rolloff is not much (in support of those who want ESSB operation. > Much of the rolloff depends on your microphone. > Jim Brown K9YC has long advocated reducing the TX EQ below 500 Hz or so in > order to increase your effective communications power. An improvement of 3 > dB or more can be had by reducing the low frequency audio since those low > frequencies take a lot of the total power and add little to communications > effectiveness. > > 73 and Merry Christmas, > Don W3FPR > > On 12/25/2018 11:03 AM, Michael Blake via Elecraft wrote: >> When using the stock K3s 2.7 KHz. roofing filter and all TX EQ settings are >> zero (0) what is the normal TX audio rolloff below 300Hz.? ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
