I expect he meant “existed for the KX2/KX3”. The Heathkit SB-230 is conduction-cooled with a beryllium oxide thermal link to conduct heat away from the anode to the heat sink.
wunder K6WRU Walter Underwood CM87wj http://observer.wunderwood.org/ (my blog) > On Aug 21, 2021, at 8:04 PM, Jim Brown <j...@audiosystemsgroup.com> wrote: > > On 8/21/2021 7:48 PM, Gary Memory wrote: >> I had no idea heat sinks existed. > > Heat sinks have been widely used since the introduction of semi-conductors in > the '50s. I don't know, but I suspect that they were used with high power > tube gear. They are discussed in Chapter 4.11 of the ARRL Handbook. > > 73, Jim K9YC ______________________________________________________________ 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 arch...@mail-archive.com
