[Elecraft] APF question

[Dale Boresz]

Hello Mike,

The APF, because of the high "Q" will naturally produce ringing with a 
strong signal. Just back down the RF Gain control until you can clearly 
hear the keying elements. However, I'd suggest that if the signal is 
that strong to begin with, you probably don't need to use the APF 
function. It is particularly effective though on very weak signals that 
are near the noise floor.

73, Dale
WA8SRA

On 11/11/2011 1:16 PM, Mike Weir wrote:
> When using the APF function on my K3 I am getting a real tinny sound to the point were it is difficult to understand the code. I was wondering if settings were ok.
> Here is what I do.
> 1. Zero beat the CW signal with the spot feature and tuning is set to fine.
> 2. The filter is set at either 400hz or 350hz
> 3. The APF setting is a .60 I also adjust this setting to see if the audio improves but it does not seem to.
> 4. I do try to fine adjust the VFO (fine setting) for the signal to jump out. All that happens is it gets more tinny.
> Any suggestions?
> Mike
> VE3WDM
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