I personally found the recent review in QST of the ANAN 100D using pre-distortion to lower TX distortion products to be the most exciting thing I have read in that rag in a LONG time. I DO hope they are setting a standard that others will strive for. It was so much better than any other rig they have ever tested, that is was literally "off the chart". Not sure I want a rig controlled ONLY with a computer interface, but this might sway my decision to at least try one!
Greg in West Mitten, KC8HXO On Thu, Oct 29, 2015 at 2:58 PM, Jim Brown <j...@audiosystemsgroup.com> wrote: > On Thu,10/29/2015 12:06 PM, frank wrote: >> >> Also, you did not answer my questions. Maybe I should ask them one at a >> time. > > > I thought Wayne answered them quite well, but I'll try to rephrase his > answers in terms that are easier to understand. > > 1) Contemporary ham rigs are designed to operate from automotive DC voltages > as a matter of convenience. > > 2) The output transistors used in these rigs produce less distortion at > higher supply voltages. > > 3) Most rigs are optimized for 13.8 - 14 VDC, and are tested at that level > by ARRL. > > 4) Most commercial power supplies marketed to hams are regulated to 13.8 - > 14.5 VDC, and that voltage is internally adjustable. > > 5) Most rigs will work at lower DC power supply voltages. > > 6) When operated at lower DC power supply voltage, their distortion will > increase. > > 7) When operated above their design output power, distortion will increase. > > 8) Doing both 6 and 7 will increase distortion even more. > > 9) Distortion in the K3 and K3S output stage is specified for full power > output at 13.8 - 14 VDC, and distortion is greatly reduced when run at lower > power levels. > > My own comments: > > Distortion causes the most QRM when running high power. Many of the best > power amps reach full power with drive power in the range of 50-60 W -- the > KPA500 needs about 28W, my Titans (I have three) need between 40-60W, > depending on condition of the tubes and the operating frequency. An ACOM > 1010 needs between 50 and 70 watts, again depending on the operating > frequency. > >> This is state of the art? > > How much do you want to pay for "state of the art?" How about the infamous > pentagon $800 hammer? > > According to ARRL measurements, the K3 produces the cleanest CW signal of > any current rig. See my summary of their published data in the following > link > > k9yc.com/TXNoise.pdf > > See my measurements of my K3 and several other rigs in this link > > http://k9yc.com/P3_Spectrum_Measurements.pdf > > 73, Jim K9YC > > ______________________________________________________________ > 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 kc8h...@gmail.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 arch...@mail-archive.com
