Hi Bob, It was an interesting article as are the QEX articles by the same author.
That QST article concludes that the RF amplifier likely won't be +thermally+ strained by the CESSB, as if means that amplifier stages are operating further towards the higher efficiency point. Normal SSB has lower average power but may as a result have increased dissipation because class AB RF amplifier efficiency drops at lower power. However the author points out that +power supplies+ may well be strained by CESSB as average current will increase. Where you have an external PSU for your K3S it might not be a problem, but it may be with the KPA500 I suppose. I can't speak for Elecraft and the K3(S), but in a recent email on the subject of possibly adding CESSB to the KX3, Wayne said they will look into it. No discussion was started about the K3 or K3S on this though, but you have asked, so perhaps we might get a hint on that too. 73 from David GM4JJJ > On 21 Jan 2016, at 14:56, Bob McGraw K4TAX <rmcg...@blomand.net> wrote: > > The recent article in February QST describing the CESSB mode is of interest. > Just wondering if that mode can or will be added to the code operating the > K3S? Also, wondering if the higher duty cycle of the CESSB mode will exceed > the ratings of the PA stage and that of the KPA500? From what I read it > seems that most SSB rated amps, past and present, may have inadequate > ratings for the higher duty cycle. > > Thoughts? > > 73 > Bob, K4TAX > > ______________________________________________________________ > 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 gm4...@yahoo.co.uk ______________________________________________________________ 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
