[Elecraft] What crystal filters for the K3 are linear phase delay (constant group delay) ?

[Larry Lopez]

It turns out that the Elecraft 2.7 KHz 5 pole filter is the winner
according to:

http://www.qsl.net/gm3woj/k3filtertestssn2203.pdf

which makes me want to make my own filter.
Still, I'm going to keep the 400Hz 8 pole filter which
is coming with my S/N 27xx Elecraft Radio !!!




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