[Elecraft] Firmware 4.18 APF adjustment using shift control

[Nate Bargmann]

* On 2010 06 Nov 07:06 -0500, 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.

I found that running the APF down to 270 Hz results in a BOOP! and the
APF is restored as with a power reset.

73, de Nate >>

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