Ciao Enzo, The last major mod to the K2 was for S/N 4060 and above using Revision B PCB, so you should be OK with S/Ns above 4900. There have been a few other worthwhile mods such as setting AGC level and the Magnetic Level Shielding Kit but these are not absolutely necessary for most applications. LA3ZA has a very nice summary of most K2 mods with links here:
http://www.qslnet.de/member/la3za/K2/modAny.html 73, Bill W4ZV -- View this message in context: http://elecraft.365791.n2.nabble.com/K2-sn-4900-5000-Upgrades-needed-tp7575646p7575654.html Sent from the Elecraft 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

