Here's some info to read: http://elecraft.365791.n2.nabble.com/KX1-Q6-question-td662532.html and here, in this erratum superseded by the revision E manual which shows the changeover: http://www.elecraft.com/manual/KX1_Owners_Manual_Errata_Rev_D-1.pdf
It seems that Elecraft went from a 2SC2166 to a 2SC5739 for RoHS compliance. A side benefit is that the new part eliminates a thermal pad, shoulder washer, and thus a potential for a short from the KX1 build. Some have reported improved output on 20M with this part, albeit with the usual warnings about too much power causing you trouble later if you don't have a great match to your antenna, a strong possibility under the KX1 normal operating conditions. Leigh/WA5ZNU -- View this message in context: http://elecraft.365791.n2.nabble.com/KX1-Variation-in-driver-transistors-e-g-2SC2166-tp6010045p6010111.html Sent from the [KX1] mailing list archive at Nabble.com. ______________________________________________________________ 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
