Joe, To generalize - 'roofing filter' would be placed right after the first mixer for best effectiveness to strip off extraneous mixing products.
The K2 is a single conversion design and the IF filter is placed right after the first mixer (there is a post-mixer amp there for good dynamic range) - so it serves both as the IF filter and the 'roofing filter'. In other words, yes a roofing filter 'does not compute' for a single conversion design. 73, Don W3FPR > -----Original Message----- > > In view of this, and excuse me for not being an engineer in > receiver design, > why is there not a roofing filter option for the K2. Is it just not > possible in > a single conversion rig? > de Joe, aa4nn > _______________________________________________ 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
