50C is not hot for a transistor. Commercial transistors are usually speced to 85C. JANS (space) transistors are speced to 125C and actually baked without bias for 320 hours at 200C. The hFE is measured before and after to check for change. 73 N2TK, Tony
Sent from my iPad > On Oct 24, 2017, at 8:23 PM, Don Wilhelm <[email protected]> wrote: > > Nick, > > Yes, I believe that should be no problem. > > 73, > Don W3FPR > >> On 10/24/2017 8:57 PM, Nick - VE3EY wrote: >> Hi Don >> >> Good question. I happen to have a Infrared Thermometer. After bashing at >> it for about 20 minutes, the temperature in the vicinity of two transistors >> (as measured against the bottom cover) peaked at 50 degrees Celsius (122 F) >> but it did not go beyond that. I ran the rig at 10 watts on 10 meters which >> is where most of the drive power is needed. >> >> I suppose that should be OK than. >> >> 73 and thanks for your feedback, >> > > ______________________________________________________________ > 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]
