Fwd: [Elecraft] K3 Filter Switching Problem? - Solved

[k4tmc at aol.com]

You K3 guys are great!  Thanks for the quick responses.

I had not set all of the FL1 positions to OFF during the filter setup 
activity.

It pays to read carefully, and then re-read, some of those instructions.

The Width function now operates as I was expecting.

73,
Henry - K4TMC
K3 #98

-----Original Message-----
From: k4tmc at aol.com
To: elecraft at mailman.qth.net
Sent: Mon, 10 Dec 2007 6:06 pm
Subject: [Elecraft] K3 Filter Switching Problem?

Warning! K3 filter use item follows.


Currently, I only have the standard 2.7 KHz filter in the FL3 slot on
the RF board.  I chose this location due to potential future additions
of the 2.1 and 1.8 KHz filters, in slots FL2 and FL1 respectively.


Here is what I observe: With FL3 manually selected via the XFIL button;
when I try to rotate the Width control below a value of 2.7 KHz, the
rig automatically switches to the FL1 position, which is empty.  The
receiver goes dead.  When I quickly reverse the Width adjustment, FL3
is not switched back.  I have to manually select FL3 again with the
XFIL button.  Once back in FL3, I can adjust the Width control to
higher values above 2.7 KHz with no problem and the passband gets 
wider.


Is this normal?  I thought the DSP circuit would continue to narrow the
passband even though the roofing filter is broader.  But, why does it
switch to an empty filter slot?  Did I do something wrong during the
Configuration setup?


Is this a firmware issue?  I have not downloaded the latest updates 
yet.


If I had narrower filters in the FL1 and FL2 slots, then I would expect
the circuit to auto-switch to those as I narrowed the passband via the
Width control.  And, they should switch back in reverse order as I
widen the passband.  Right?


73,

Henry - K4TMC

K3 #98

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