[Elecraft] Firmware 4.18 APF adjustment using shift control

[Ken K3IU]

After someone else noted that turning the APD Shift CCW it 
returned to normal ops when reaching 0.27. I just tested 
here and after turning to APF 1.00 and activating the 
pops/cracks, turning the APF Shift CCW until it reaches APF 
0.20 and returns the APF to normal ops w/o the pops/cracks.
73,
Ken K3IU
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
On 11/6/2010 8:37 AM, Ken K3IU wrote:
> K3 #202, MCU 4.18, et al.
> Similar experience here. Everything normal until I rotate 
> the APF Shift CW and it reaches 1.00 the loud pops/cracks 
> begin when rotating both the "Shift" and "Width" knobs. 
> Rotation of the APF Shift knob now changes the display 
> numbers (APF 0.xx), but the Rx is very quiet... both 
> speakers and earphones. Powering K3 OFF/ON returns the K3 
> to normal operations. When I cycle back to APF Off (Preset 
> II on my K3), Rx works normally with sound in both 
> speakers and earphones. The first time I switched back to 
> Preset I (APF On) the Rx worked as it should. 
> Subsequently, switching back to Preset I produces a quiet 
> Rx with only the popping when the APF Shift or Width being 
> rotated.
>
> 73,
> Ken K3IU
>
> On 11/6/2010 7:46 AM, Len, K3LJ wrote:
>> Gentlemen, thanks for adding the APF to the K3 and the quick response to the
>> bug that some operators were experiencing. The APF works great. I did find
>> that while adjusting it when I got to APF 1.0 I heard a click in my
>> headphones that I am using and as I tried rotating the shift control counter
>> clockwise or clockwise that I could here the APF "stepping" but there was no
>> visible indication on the display of it or any receiver audio heard. Just
>> the clicks as I turned the shift control. Turning off the rig and turning it
>> back on brought everything back to normal.
>>
>> 73,  Len  K3LJ