[Elecraft] MCU 4.51

[Guy Olinger K2AV]

I found on what I was listening to, that turning off the IF blanking
cleaned it up and t1-7 or t2-7 was incredible for key clicks.  The
other thing was that I always carefully minimize signal input on lower
bands with ATT/ /PRE/RFgain at only high enough to bring up band noise
to moderate in the passband.

Additionally I used the 8 pole CW filters, and set their offset so
that the -30 dB points were equal either side when the DSP and the
true filter bandwidth matched (450 and 350).  The 350 in particular
turns the clicks into spikes, which the K3 and NB handle extremely
well.  I have seen key clicks reduced 7 or 8 S units in some cases.
And this was on 40m on the big 5 element quad on a 58 meter catenary
fixed on Europe.  Some REALLY loud Eu signals on that antenna.

Yes, I too can get NB artifacts with extremely loud in-band signals.
But the biggie I care about is killing the key clicks.  That's worth
the price of the radio all by itself.

73 & GL, Guy

On Sun, May 13, 2012 at 3:53 PM, Arie Kleingeld PA3A <pa3a at xs4all.nl> wrote:
> Guy,
>
> Well,  both NBs create artifacts if pushed to hard.
> I have not encountered any problems when using this config (DSP x-3 and IF
> med-3).  If I run any of the two NBs on x-7 it really  becomes bad.
>
> But your advice inspires me to experiment again.
>
> 73
> Arie PA3A
>
>
> Op 13-5-2012 15:16, Guy Olinger K2AV schreef:
>
>> For taking care of key clicks, NB LEVEL set to DSP t1-7 or t2-7 and IF
>> *OFF*  is best.  I got excellent results with the milder t1-7 in 4.51.
>>  IF ON is traditional IF blanking with all the traditional artifacts.
>> Kept on the K3 because it's still best for some kinds of noise.
>> Traditional IF blanking in anyone's RX still will create lots of
>> artifacts in a crowded contest band with lots of strong signals,
>> including the K3.
>>
>> 73, Guy.
>>
>