Thanks for the reply Don. I tried to down load the instruction manual but get an error "page not found", so wasn't sure what mods were incorporated.
Barry On Thu, Jun 25, 2020, 3:25 PM Don Wilhelm <[email protected]> wrote: > Barry, > > All K2s above SN 3000 are revision B - and that is what is being shipped > today. > > The original Field Test and Rev A K2s began to have many mods added to > them, so finally the boards were laid out again to incorporate all those > mods onto the new boards - the result was Rev B. I believe that > happened in 2003. > > A fully upgraded early K2 will perform just like a brand new one. One > witness to that fact is my SN 00020 which was a Field Test model. > > There are a substantial number of mod kits for the K2, and they are > listed on the K2 A to B upgrade instruction sheets. > The one thing that is not covered in those instructions is the > installation of the upgraded IF crystals (changed at SN 2560) and the > KSB2 mods such as the PSK mod and the widening of the KSB2 filter to > 2.4kHz instead of the original 2.1kHz. > > Also not covered is upgrading the KPA100 - the KPA100UPKT will bring any > KPA100 up to the latest level. The KPA100 does not carry a serial > number, so the latest level must be determined by inspection. If > toroids L16 and at RFC4 have blue cores, it is the latest. The older > ones have red cores at L15 and L16. There have also been upgrades in > the KPA100 shield. The latest has a 1/4 inch wide slot above the SO239 > jack and has spring clips that ground the shield to the sides of the > base K2. For other than the Field Test KPA100s, the board has not been > changed. > > 73, > Don W3FPR > > On 6/25/2020 2:51 PM, barry halterman wrote: > > Could someone tell me main differences between the version A and B for > the > > K2? > > Is the version B being shipped now if ordered? > ______________________________________________________________ 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]
