[Elecraft] New K3 owner, couple of questions (APF vs. DUAL PB, NR under the water sound, KPA3 temp)

[Sam Morgan]

I saved this gem of a post from Jack WA9FVP

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Re: [Elecraft] [K3]Noise Filter (NF) ADJ

wa9fvp Thu, 27 Dec 2012 16:19:36 -0800

There's no documentation but as far as I can tell--

F1-x through F4-x defines the amount of noise reduction or how aggressive
the filter attacks the I.F. noise.  F5-X through F8-X defines the amount of
reduction and the level that's mixed with the filtered and non-filtered 
I.F.
Note that "m" which means "mix" will appear after F5-X and above.


X defines the delay.  Delay is the amount of time it takes for the filter to
converge on a non-sinusoidal signal or the noise.   The higher the number,
the longer it takes for the noise to reduce to a low level.

I hope this helps.

Jack WA9FVP

F1-x through F4-x are for CW
F5-x through F8-x are for SSB
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On 3/10/2014 12:06 PM, Andreas Hofmann wrote:
> Hi,
>
> I put together my new K3 without any issues. My 8 and 10 year old daughters helped and they really enjoyed it too. Overall I am very happy with its performance.  I do not seem to need PRE on the high bands as much, but I do seem to need ATT on the low bands more...  I guess that is by design. I have a few things I need to figure out and the manual does not seem to help:
>
>
> 1.       DUAL PB, APF. I am not sure I get the APF to work. I do not hear or see the middle peak of the filter. I think I only get DUAL PB, no matter what I set in the config menu.  I am using the latest FW. Any ideas how to verify?
>
> 2.       NR:  I like how the noise goes away, but I do not like the under-the-water sound (K2 owner, no DSP experience).  I seem to switch constantly back and forth... I am using the default setting for NR (F1-1). Is there a way to back off the setting slightly to have a better compromise setting?
>
> 3.       KPA3 temp: The fans are MUCH quieter as my K2's which is good, but I do worry that I have not setup something right...When I monitor the KPA3 temperature, what is the max value that I should watch out for? I am getting up to 41 C during casual operation.
>
> Thanks in advance and 73,
> Andy
> KU7T


-- 
GB & 73
K5OAI
Sam Morgan