[Elecraft] How to outfit a K3 for JT65HF or JT9

[Don Wilhelm]

The hardware AGC cannot be turned off - it is a protection system for 
the ADC that proceeds the DSP and must be protected from overload 
otherwise garbage will be the result.   Yes, the tunable notch will 
attenuate signals that are within the passband of the roofing filter, 
but only the roofing filter can eliminate those strong signals that 
activate the hardware AGC.  AGC off only applies to the DSP AGC.  Apples 
and Oranges!

73,
Don W3FPR

On 4/21/2014 8:51 PM, Sam Morgan wrote:
> don't forget the K3's tunable Notch, I have found it works quite well 
> to attenuate those offending S9 +30 signals. The width is just shy of 
> a JT65 signal, but if you make sure to cover the low end it works. You 
> can watch it working in the waterfall. I always run with the K3's AGC 
> off...ymmv
> sm
>