APF For K3
Posted by
Roy Morris-6 on
Oct 25, 2010; 5:47pm
URL: http://elecraft.85.s1.nabble.com/APF-For-K3-tp5671688.html
Paul,
I agree that the APF needs to have a high Q center frequency. This peaks the audio in a razor thin passband enabling a weak CW signal to be heard. A variable audio passband is needed as well as an adjustment for depth of peak. There is no feature on the K3 that can do the job better than a good APF function. From some of the comments I have read on this reflector I do not believe many hams are familiar with this feature. Those who primarily use CW would find APF highly desirable. Roy Morris W4WFB
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