Very good analysis by SM5BSZ. In addition to the points he makes about Flex transmitters, the question he asks about the ARRL reviews seems to raise a serious problem. ARRL has identified key-click problems and certain other transmitter artifacts in their reviews, but this phase noise issue is never mentioned -- despite the 43 dB difference in transmitter quality that he highlights. As Lars points out, this is the difference between 50 mW and a kilowatt. And as he further comments, manufacturers could very likely improve transmitted signal quality without increasing production cost.
Tony KT0NY On Wed, Oct 16, 2013 at 6:52 PM, Gedas <w8...@mchsi.com> wrote: > Thanks Lars. It may be time to try to duplicate some of the measurements > made by Leif just to make sure. I do have the same SA he mentions in the > article and will try to get to it as soon as I finish up some important > projects. Right now I am trying to get my Diesel tractor running again > before the snow falls. 73 > Gedas, W8BYA > > Gallery at http://w8bya.com > Light travels faster than sound.... > This is why some people appear bright until you hear them speak. > > ----- Original Message ----- From: "Lars Pettersson" <sm4...@telia.com> > To: <flexradio@flex-radio.biz> > Sent: Wednesday, October 16, 2013 3:19 PM > Subject: Re: [Flexradio] Noise Sidebands, Article by SM5BSZ > > > Hi Gedas >> we where supoosed to measure my 5000 but time has not been able to do >> that but BSZ said its the same construction faults so probably the same >> issues. >> Lars SM4IVE >> >> Gedas skrev 2013-10-16 20:59: >> >>> I came across this interesting article by SM5BSZ who discusses some >>> possible transmitter issues with many radios, including the Flex. It has >>> me a bit concerned. I am wondering if anyone has seen similar data for the >>> Flex 5000? The article may be found here: >>> >>> http://www.sm5bsz.com/**dynrange/dubus313.pdf<http://www.sm5bsz.com/dynrange/dubus313.pdf> >>> >>> Gedas, W8BYA >>> Gallery at http://w8bya.com >>> Light travels faster than sound.... >>> This is why some people appear bright until you hear them speak. >>> ______________________________**_________________ >>> FlexRadio Systems Mailing List >>> FlexRadio@flex-radio.biz >>> http://mail.flex-radio.biz/**mailman/listinfo/flexradio_**flex-radio.biz<http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz> >>> Archives: >>> http://www.mail-archive.com/**flexradio%40flex-radio.biz/<http://www.mail-archive.com/flexradio%40flex-radio.biz/> >>> Knowledge Base: http://kc.flexradio.com/ Homepage: >>> http://www.flexradio.com/ >>> >>> >> -- >> I only work real EME no chatts no JT >> CW is King!!!! >> >> >> ______________________________**_________________ >> FlexRadio Systems Mailing List >> FlexRadio@flex-radio.biz >> http://mail.flex-radio.biz/**mailman/listinfo/flexradio_**flex-radio.biz<http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz> >> Archives: >> http://www.mail-archive.com/**flexradio%40flex-radio.biz/<http://www.mail-archive.com/flexradio%40flex-radio.biz/> >> Knowledge Base: http://kc.flexradio.com/ Homepage: >> http://www.flexradio.com/ >> > > > ______________________________**_________________ > FlexRadio Systems Mailing List > FlexRadio@flex-radio.biz > http://mail.flex-radio.biz/**mailman/listinfo/flexradio_**flex-radio.biz<http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz> > Archives: > http://www.mail-archive.com/**flexradio%40flex-radio.biz/<http://www.mail-archive.com/flexradio%40flex-radio.biz/> > Knowledge Base: http://kc.flexradio.com/ Homepage: > http://www.flexradio.com/ > _______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/
