hi...  thanks for the reply...  yes, i read lyle's description of the 
two filters, which is how i knew that the 3.25 filters all had an FIR 
of 61 taps...

what i'm looking for (in order do to an honest A:B comparison between 
3.25 and 3.27 on my rig) is what Fx-y on 3.27 would most closely 
match the F3-1 configuration of 3.25

73
robin (K9RDG)


>Date: Thu, 27 Aug 2009 10:18:54 -0500
>From: "Bill" <k9...@live.com>
>Subject: Re: [Elecraft] K3 NR (what is the equiv to F3-1 from 3.25?)
>To: <elecraft@mailman.qth.net>
>
>I thought Lyle's email quoted below was very helpful: 
>
>       The way the new beta NR works is:
>       Fx-y selects the length of the filter.
>       F1 = 121 taps, F2 = 91 taps, F3 = 61 taps, F4 = 31 taps
>       (The Beta 3.25 release used FIR filters of 61 taps.)
>       y selects values of Beta (gain), decay, and delay (how long the NR
>algorithm waits to process a signal)
>       (The Beta 3.5 release used the "x" parameter for these selections)
>       73,
>
>       Lyle KK7P
>
>73,
>
>Bill
>K9YEQ
>K2 #35; KX1 #35; K3 #1744; mini mods
>ATS-3B
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