Don, I do not like to add to your workload, but I would be interested to know if the heat generated by the Mitsubishi power module has any negative effect on the transverter's noise figure (receive mode) if you have the time to measure it. If I understand the layout of the XV50 correctly, the input circuitry of its receive path is placed quite close to the power module.
My reason for asking is that I have been considering the option of buying a XV50 for use in a set up dedicated only to 6m EME, rather than building a transverter from scratch 73, Geoff GM4ESD Don Wilhelm wrote on Sunday, June 06, 2010 at 3:59 AM: > 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 ______________________________________________________________ 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
