-----Original Message----- I have light doubt that aroused yesterday night when I reached page 52 of part II assembly. In the current manual to build S/N 4726 it instructs to install 3 components on the bottom of the board (C91, RFC15 and C88). I remember that when I build S/N 3279 there were only 2 components, C91 and RFC15. As far as I understood from the information about the additions on the hardware side, those were mainly related to the CW shaping envelope and also the 2 diodes D40 and D41 to prevent RX overloading. I wonder if I should have to add the 68pF capacitor C88 to the bottom side of the board on my S/N 3279. --------------------
These changes have to do with stability on 7182 kHz of the PLL. See page 5 of http://www.elecraft.com/manual/k2a2binstr.pdf. C88 was added to improve the stability, and is part of the A to B upgrade. You can add it to the old K2 also, especially if you have gained access to 7.1-7.2 MHz in EA-land as we have just been allowed to in LA-land. 73 Sverre LA3ZA http://www.qsl.net/la3za/ _______________________________________________ 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
