I have a small mountain of data with efficiency and transmitted intermodulation versus supply voltage for my K3, but have yet to finish analyzing it.
For the most part, higher voltage = better transmitted IMD, but the lower the overall DC efficiency (RF watts out / DC watts in). I've not desired to tempt fate by running the tests above 15.0V, however, and I don't recommend exceeding 15.0V under any circumstances. Most of the benefit of higher voltage operation can be achieved in the 13.8 to 14.2 V range, as measured at the K3's DC input connector. Remote voltage sensing to obviate the cable drop is quite useful here, *if one knows how to properly use it*. If the power supply is not equipped with an over-voltage trip, however, a failure in the remote voltage sensing cable could lead the power supply to put out sufficient voltage to damage the K3. Jack K8ZOA Darwin, Keith wrote: > -----Original Message----- > From: [email protected] > > I don't think we even want to go here, Eric, PLEASE stop this thread > immediately!!!! > > ------------------------- > > Why? I think it is an interesting question. I suspect that increasing > the input voltage will either have no effect or will cause harm if done > too much but would like to hear the inputs from the experts. > > - Keith N1AS - > - K3 711 - > > ______________________________________________________________ > 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 > > ______________________________________________________________ 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
