[Elecraft] K3: Odd ALC behavior

[Richard Lamont]

On 04/08/17 19:33, Brian Hunt wrote:
> Here's some followup:
> FLDIGI shows the "pumping" affect with carrier tones of 500, 1000, 1500,
> and 2000 Hz.
> WSJT-X 1.8 shows the "pumping" affect with carrier tones of 1000, 1500
> and 2000 Hz (couldn't select 500 Hz).
> 
> The affect is very narrow with frequency.  10 Hz either way and the
> output and ALC display and MON output is rock solid.  Changing the K3
> filter center frequency has no effect on the above.

This looks like a beat between the modulating frequency and some
sampling process associated with the ALC meter.

73,
Richard G4DYA