[Elecraft] K2 Filter question

[Robert G Strickland]

Mike...

The K2 does not have individual filters like the K3. It has a set of 
serial crystals in a lattice filter arrangement [sic] that can be 
voltage biased to yield various effective filter widths from very narrow 
to broad. There are provisions to select three/four  pre-programed 
filter widths per mode [not quite sure of this one]. The various widths 
are set up in the filter calibration mode of the K2. W3FPR Don Wilheim's 
site has all sorts of information on general principles as well as 
step-by-step instructions for setting the filter widths in the K2. An 
auxiliary program called "Spectogram" is used to portray the filter 
widths on the computer screen so that one can see the shape/bandwidth of 
the filter during setup. In my experience, the filtering system in the 
K2 is quite effective. Others will no doubt add to this limited 
description of the K2 filtering method and results.

...robert KE2WY

On 01/08/2017 16:10, Mike Smith VE9AA wrote:
> Hello from NB,
>
>
>
> It's Mike,  VE9AA...I own a K3 but almost never use it (only for FD and
> portable ops -I've used it twice in my year of ownership)
>
>
>
> I am thinking about maybe buying a used K2/10 with many options,(no DSP
> board I don't think) but as I don't know a thing about the K2 (and after
> reviewing the Elecraft website) I had this hopefully simple question. (I
> have not yet contacted the seller)
>
>
>
> Are there optional CW filters still available for the K2 or does it come
> with them all built in ?
>
>
>
> I do mostly CW so was looking at doing most of my operating with a 200-300Hz
> filter.(and perhaps with a 1.8kHz SSB filter when I am on phone)
>
>
>
> I apologize if the answer is overly obvious !
>
>
>
> Thanks much,
>
>
>
> dit dit Mike VE9AA
>
>
>
> Mike, Coreen & Corey
>
> Keswick Ridge, NB
>
>
>
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-- 
Robert G Strickland, PhD ABPH - KE2WY
rcrgs at verizon.net.usa
Syracuse, New York, USA