Yes, there is a master switch. I think I forgot about that. > On Jun 30, 2021, at 8:47 AM, Ken Winterling <wa2...@gmail.com> wrote: > > Phil, > > No need to unplug the KPA500 when not in use. There is a master power > switch on the rear panel that will disconnect everything. > > Ken > WA2LBI > > > > > > On Wed, Jun 30, 2021 at 11:41 AM Louandzip via Elecraft < > elecraft@mailman.qth.net> wrote: > >> I use a clamp on ammeter and a short power cord jumper with the wires >> separated where I can clamp over the black wire. That quantitatively tells >> me the power being consumed/dissipated. Keep in mind temperature is >> intensive whereas heat is extensive. >> >> Lou W7HV >> >> On Wednesday, June 30, 2021, 9:32:28 AM MDT, Phil Hystad via Elecraft < >> elecraft@mailman.qth.net> wrote: >> >> Living in the Pacific Northwest and having just gone through a big bath >> of heat I have become a temperature detective. Anything not being used >> should not be radiating in the infrared spectrum above surroundings. Thus, >> all of my radios are off. >> >> Or, so I thought. I forgot that the KPA500 was still on though off and I >> put my hand on the side of the cabinet and discovered some dastardly warmth >> — a “no-no” in this non-air-conditioned house. So, I unplugged the KPA500 >> for the time being. >> >> But, I was surprised. I would have guessed that I would not be able to >> sense any warmth from the cabinet as the surrounding environment should >> have kept it cooler. It was not hot. Just warm to the touch. Definitely >> not as warm as my iMac computer that I am using at the moment. >> >> I should get my infrared temperature sensor and measure the actual >> radiated temperature and maybe I will do that some day. >> >> But, is this normal? I assume that there is a small current powering a >> micro processor and its related circuitry but should it be actually that >> warm — is there a cpu burning "idle loop" used and thus causing high >> current flow thru the processor. >> >> If it were not for the fact that breakfast is almost ready (steel cut >> oatmeal) I would plug the KPA500 back in and wait a while and then measure >> the temperature of the cabinet. I will do that later. >> >> 73, phil, K7PEH > ______________________________________________________________ > 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 phys...@mac.com
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