[Elecraft] K3 APF/Dual PBT

[Fred Jensen]

Sounds like something is wrong Mike.  My CONFIG:DUAL PB toggles between 
"nor" and "APF."

The APF takes a little practice.  Except when I'm NCS of our traffic 
net, I run about 250 Hz DSP BW.  I have found that the APF gets very 
hard to tune with anything less than that and 300 Hz is even better. 
APF performance also seems to be somewhat connected to AGC settings.

Once I mastered it, mine works great, I use it all the time to pull very 
weak SOTA guys running a few watts to a compromise antenna out of the noise.

73,

Fred K6DGW
- Northern California Contest Club
- CU in the 50th Running of the Cal QSO Party 3-4 Oct 2015
- www.cqp.org

On 3/14/2015 9:31 PM, Michael Marx wrote:
> 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