Gentleman, My promised temperature rise measurements will have to be delayed a bit. This XV50 has a bad power output module and I will have to wait for one to be sent from Watsonville. Later next week, I will have the data.
BTW - Mitsubishi in their notes at the end of the data sheet suggest that the module case temperature should be limited to 60 deg/C - but that is "too hot to touch" (140 deg/F), so the "excessively hot" criteria may actually be well within the limits of tolerance - I would not want to hold my hand very long on a surface that is at 60 deg/C. Also, I do agree that other components can be affected by the temperature rise, but most are spec-ed at 60 deg/C, so in reality, there may be no problem, just a "discomfort zone" - details after the new module arrives. 73, Don W3FPR Don Wilhelm wrote: > Eric, > > Have you actually measured the temperature rise? I am interested in > just how much is "excessively hot". > While it does get warm, I have always found the temperatures to be well > within spec for the output module. > > I have an XV50 here for repair right now. It is next in line for work, > and I intend to get to it this weekend. After it is repaired, I will > measure the temperature rise on the bottom panel right under the heat > spreader. I have a Fluke 279 with a temperature probe available. > > Report on Monday. > > 73, > Don W3FPR > > Eric wrote: > >> I have a late-model xv144 with holes in both top and bottom panels, >> connected to k3 with milliwatt drive. It runs excessively hot at 10w out in >> digital mode EME when used one minute on one minute off, so i dont think >> just getting new panels will help you. I use a small muffin fan blowing air >> underneath with the xv-144 up on the optional tilt stand and this simple >> solution works great. >> >> I also use an xv-432 for eme at 10w but its internal fan keeps it cool. >> >> Perhaps if enough people request a retrofit kit with an internal fan for the >> xv-50 and xv-144 Elecraft would consider it. I'd pony up. The fan could >> attach inside the top panel. >> >> 73 >> >> Eric WD6DBM >> >> >> > ______________________________________________________________ > 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 > > ______________________________________________________________ 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
