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:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
