[Elecraft] K3 Questions and gripes

[Vic K2VCO]

This is the way most analog noise blankers work. They look at a wide bandwidth to detect 
noise pulses and if there are loud signals in the range they can be interpreted as noise.

The K3 has both an analog and a DSP noise blanker. If there are large nearby signals, you 
should reduce the aggressiveness of the analog (or 'IF') blanker. You can do this by 
holding the NB button and then turning the VFO A knob. The DSP noise blanker -- which will 
not be affected by off-frequency signals -- is adjusted with the VFO B knob.

Depending on the type of noise and signals on the band, you will want to use different 
'mixes' of analog and DSP noise blanker adjustments.

Regarding the power switch, I've found that a cat is highly effective at reducing nibbling 
by mice (just kidding, ask Elecraft for a fix)!

On 12/12/2010 7:59 AM, David F. Reed wrote:
> Hi folks;
>
> Yes, I really love my K3 in spite of my questions and gripes; here they are:
>
>     1. During the 10 meter contest, I was up around 28.400 operating SSB
>        with the NB on, when I noticed that I was getting a strong CW
>        signal pumping my AGC (or so it seemed).
>
>        In doing a little research, I found the cw station responsible was
>        down at 28.023, at about S9+40 db; by call, I know the station and
>        that he is about 3 miles away.  Far enough and weak enough that I
>        should not be receiving this sort of interference I think, given
>        there are no key clicks, etc.
>
>        I turn off the NB, and it clears up completely, even 500Hz away,
>        let alone 300 or 400 KHz away.   I go back up, no problem except I
>        want to use the NB; turn it back on, problem re-appears.
>
>        This seems to be an artifact of how the NB is implemented,
>        rendering it useless under these sorts of circumstances.
>
>        Am I missing something, out of adjustment, or ???
>
>     2. The power switch - early serial number (1476); my power switch -
>        well the rubber / plastic part you press on - is starting to look
>        like a mouse has nibbled on it, with little divots falling off
>        along the top and right side edges.  It is looking quite ragged.
>        Has anyone else had this, or know if I can replace just the
>        rubber/plastic part, or do I need to replace the entire switch
>        assembly?
>
> Thanks and 73 de Dave, W5SV
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-- 
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco/