Waveform? When you have a 1 ms raise/fall time no way you can shape the waveform so it doesnt click.
/Jim SM2EKM --------------- On 2010-12-03 15:29, Guy Olinger K2AV wrote: > All the click complaints for years and still Yaesu doesn't take care > of the waveform. It's not like there aren't tons of reads on the > subject, no excuse at all since Google. It's more like they just > don't care, or are simply convinced it doesn't matter. After all, > isn't CW obsolete, and nobody uses it anymore, right? > > 73, Guy. > > On Fri, Dec 3, 2010 at 9:08 AM, Paul Christensen<w...@arrl.net> wrote: >> 4 ms. Given that the FTdx5K rise/fall is roughly double the time of the >> K3 -- and that the K3 at 2 ms consumes significantly less bandwidth than the >> FTdx5K at 4 ms, the CW transmit quality of the K3 is far superior. I would >> like to hear QSK on the Yaesu, compare it with the K3's QRQ mode, and note >> any audible artifacts in the headphones -- especially for signs of clicks >> and DC thumps. >> >> Referring to the December, 2010 QST Product Review on p.45, take a look at >> the leading edge of the second pulse (lower trace) in Figure 1. The sharp >> rise and sharp edge at the top of the waveform is what is consuming the >> bandwidth. Based on that waveform, it was absolutely generating clicks at >> some distance from the Fc. That pattern is characteristic of a deficient >> ALC system. >> >> A deficiency in the ALC system then takes us into SSB Tx IMD. The published >> FTdx5K Tx IMD numbers look great with the ARRL's steady tone method but >> arguably, that's probably more relevant to data modes. The question is >> "what is the FTdx5K's ALC doing to undermine the rig's otherwise excellent >> SSB Tx IMD numbers, especially in Class A?" Really, the published Tx IMD >> figures are meaningless unless dynamic testing is conducted to simulate >> rapid changes in power associated with voice modes. >> >> Paul, W9AC >> >> ----- Original Message ----- >> From: "Jan Erik Holm"<sm2...@telia.com> >> To:<elecraft@mailman.qth.net> >> Sent: Friday, December 03, 2010 8:27 AM >> Subject: Re: [Elecraft] Fwd: New Sherwood report >> >> >>> Yes but to what rise/fall time was the radio set? AFAIK in >>> the FT5000 it can be changed. >>> >>> /Jim SM2EKM >> >> ______________________________________________________________ >> 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
