Don, Wasn't there talk a while back about someone replacing the Noise Blanker with another crystal filter? If it was switchable, like switching in and out the Noise Blanker, would that add to the shape of the skirts in the present crystal filter? Not sure about making up for any loss in the added filter though. Maybe set up this added filter for CW (400-600HZ) ?
I still haul the K2 down to WP2Z. 73, N2TK, Tony -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Don Wilhelm Sent: Wednesday, November 08, 2006 10:15 AM To: Joe-aa4nn; elecraft@mailman.qth.net Subject: RE: [Elecraft] K2 Roofing Filter? 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 _______________________________________________ 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
