Re: K3 Filter problem Part II

Posted by Bill W4ZV on
URL: http://elecraft.85.s1.nabble.com/K3-Filter-problem-Part-II-tp3807347p3807642.html

k1tl wrote

Hi Gang,

Failed to mention that when the filter switches above 2.1KHz, the tone moves
up the band and ditto when above 2.7KHz, the tone moves up a few KHz on the
band....annoying to say the least...so the problem may be somewhere else in

The movement is caused because your 2.7k 5-pole has a different IF offset than the other 8-poles, which have zero offset.  The fact that the tone is "reverse" passband means that it's an image.  Have you tried CONFIG: SIG RMV?

73,  Bill