Well, you made me think, but it turns out, you are right. The CAL FIL display says "t" for the 2.20 setting, but it's really using OP1. However, with the alignment done on 2.20 and transmit done on OP1, the filter will be very off, and the ripple is extreme.
My 2 year old KSB2 seems OK in the flatness department. Dan / WG4S / K2 #2456 Bob (G3VVT) sez: The option of OP1 or 2.2, etc in the filter selection is for receive only. <snip> _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net 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
