[Elecraft] K-3 Ref Cal adjustment affected 400 hz 8 pole filter

[David Cutter]

Could the P3 or another sdr/panadaptor be used to do this alignment?

David
G3UNA


----- Original Message ----- 
From: "Jim Brown" <jim at audiosystemsgroup.com>
To: <elecraft at mailman.qth.net>
Sent: Sunday, August 15, 2010 4:01 PM
Subject: Re: [Elecraft] K-3 Ref Cal adjustment affected 400 hz 8 pole filter


> On Sun, 15 Aug 2010 10:45:53 -0400, kz5d at aol.com wrote:
>
>> Is this expected behavior?
>
> Yes, it appears to be within the normal tolerance of the filters. I have a
> total of three 400 Hz filters and three 250 Hz filters between two radios
> (one with a sub-RX). I've measured them all with a spectrum analyzer,  and
> all require some offset to center them in the K3 IF, typically 40-100 Hz.
>
> 73, Jim K9YC
>
>
>
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