I think the best solution would be to try it both ways and see what kind of signal report you get. I'd be interested to see the two JT waterfalls compared side by side.
73, Frank KG6EYC On Thu, Jul 18, 2013 at 3:47 PM, Ron D'Eau Claire <r...@cobi.biz> wrote: > I think it's a good question, but I cannot answer it. > > Most amps produce more distortion the more power they run. > > The question is whether the sum of distortion from both amps at lower power > is less than one amp running at higher power. > > 73, Ron AC7AC > > -----Original Message----- > > > On 7/18/2013 3:08 PM, Chris Johnson wrote: > > I love my KPA500. I don't use it enough because of all the low power > > digital I do. I was wondering if the quality of my signal would > > better if I let the KPA500 produce the output even if the wattage is > > 50 or less watts. If I drive it with 1 to 5 watts, it produces 10 > > to 50 watts. I like the thought of offloading the thermal load of > > my long JT65 & JT9 duty cycles onto the KPA rather than my main rig > > which is a Flex 6700. > > You're likely to stimulate more replies than the "Why is aeronautical VHF > comm still AM?" did. :-) > > I don't know anything about a Flex <anything> but, all amplifiers have > non-zero distortion figures. Putting two "in series" will add up at least > some if not all of them. The amp in your Flex followed by the > KPA500 will most likely produce a poorer signal quality than just your Flex > for the same power output. > > Secondly, the KPA500 was designed to produce several hundred watts with a > few tens of watts drive [500W on any band for me takes between 25 and > 30 watts drive]. That's probably the optimum operating point. Driving it > with 5 watts should produce somewhere in the 50+ watts output range. > > 73, > > Fred K6DGW > - Northern California Contest Club > - CU in the 2013 Cal QSO Party 5-6 Oct 2013 > - www.cqp.org > > ______________________________________________________________ > 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 > -- FHC #4224 | 30MDG #6370 | DMC #5698 NAQCC #6554 | SKCC #10435 | FISTS #16155 ______________________________________________________________ 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
