Depending on the antenna in use, I have had this happen.. to the exact detail.. what happened to my K2, was simple.. wind built static on the antenna, there was no path to ground, but through the K2 finals.. so when the potential reached high enough to break down the resistance in the path.. it did. How to solve this issue so it does NOT ever happen again? Provide a dc path to ground from the antenna.. both sides of a dipole.. if balanced line fed. Some modicum of relief can be had by adding a 100k resistor to the center conductor of the antenna port to ground.. this will only help.. it is NOT a cure all.
Have a great day, --... ...-- Dale - WC7S in Wy > Date: Mon, 28 Dec 2015 20:52:42 -0500 > From: kandkstu...@gmail.com > To: elecraft@mailman.qth.net > Subject: [Elecraft] K2 - Q7 and Q8 failure > > While operating my K2 (SN 7581) on CW I heard a loud pop! I traced it to > blown Q7 and Q8. They are physically blown apart. The K2 was operating > normally before this happened. Everything else seems to be OK except for no > power output. The driver seems to be working; I can key the radio and hear > it in another RX. The K2's RX is working normally. Any thoughts as to why > this happened would be appreciated. > > Ken/N4KS > ______________________________________________________________ > 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 daleput...@hotmail.com ______________________________________________________________ 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
