I don’t have a dog in this fight - someone who spends half the year (the half with all the good contests) in a Florida condo is not a candidate for buying amps. But might water cooling be a possibility? As in a heat sink that sits in water, with appropriate thermal shutoff if the water/amp get too warm?
And when that happens, get fresh cool water. 73 - Jim K8MR > On Jun 2, 2018, at 4:06 AM, John Perlick <[email protected]> wrote: > > Bill Schmidt is right--you have to get rid of a bunch of heat--no matter what > device you are using to amplify (tubes, transistors, or magic). The > amplifying device must dissipate considerable heat because we are running > Class AB and because of all electronic devices are naturally lossy. > > Remember that this heat is generated not only in the RF transistors, but also > in the power supplies, bias circuits, lights, etc. There are lots of heat > sources in every amplifier. > > I can honestly say that my KPA1500 is considerably quieter than the Expert > 2KFA that I just sold and I would have to say it is quieter than my old Alpha > 87A. I do operate it at full 1.5 KW output but I suspect my duty cycle on CW > has not caused it to so how that the fans max out. Same for the 2KFA, but > even at low speeds, it was far noisier. And, the 2KFA has REALLY loud T/R > relays! > ______________________________________________________________ > 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 > Message delivered to [email protected] ______________________________________________________________ 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 Message delivered to [email protected]
