[Elecraft] K3 APF/Dual PBT

[Dave Olean]

Nothing wrong except the firmware. A recent version (5.08 or 5.10) disabled 
the dual band audio filter. I had the same problem. Check and see if the APF 
is active when you push and hold the DB FIL button while in CW mode. It 
should be active. Solution is to upgrade to 5.13.
K1WHS
----- Original Message ----- 
From: "Michael Marx" <sndtubes at vacuumtubes.com>
To: <elecraft at mailman.qth.net>
Sent: Sunday, March 15, 2015 4:31 AM
Subject: [Elecraft] K3 APF/Dual PBT


> When I go into my K3’s CONFIG menu to the Dual PB setting, The only value 
> I see in the screen is two dashes  —  Turning the knob that normally will 
> change a menu value has no effect.  I’m wondering if my APF is working 
> properly as even when I tune in a station on CW with the APF, it is very, 
> very hollow and rings a lot.  Maybe this is normal.  It really does not 
> help with a weak signal as it rings so badly you can’t hear the weak 
> signal.  I don’t think this is what is supposed to happen?  The APF in my 
> Icom IC746 works much better (and probably shouldn’t).
>
> But it does seem that the item in the config menu doesn’t work at all.  Is 
> this normal, or is this because I’m using the latest beta firmware or 
> something is wrong.
>
> 73 all,
>
> Mike WB0SND
>
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