Hi, Ken: The only thing about the K2 that comes to mind depends upon the age of your K2. If it's fairly recent (S/N 3446 or later) it's as stable as it can be. However, if you have an older one, there are two important mods to make it more stable. One mod improves the BFO stability and the other mod improves the local oscillator phase locked loop reference oscillator stability.
These mods are especially important for stability on the higher HF bands such as 10 meters because on those bands the drift characteristics of the BFO and PLL reference oscillator were such that they added to increase the drift. This issue wasn't noticed for a long time in part because the drift characteristics tended to cancel each other out on the lower bands, due to the way the mixing scheme works in the K2. The circuit changes were made standard in K2's after S/N 3446, so if you have a newer one, the improved circuits are already built in. If you have an older one, you can purchase upgrade kits from Elecraft. Ron AC7AC -----Original Message----- Hi to all from a new member to the list. I just ordered a K2 kit plus the add-ons and an XV50 and an XV144. I am very interested in weak signal working on VHF and to that end have also ordered the XVOVN crystal oven for the XV144. Assuming that this makes the transverter very stable, can I just ask if any other actions need to be taken to the K2 itself, or is the rig fine at 28Mhz which is where I will be transverting from? Any info most welcome. 73, Ken. _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
