[Elecraft] [ELECRAFT]K2

[Don Wilhelm]

Jean,

It sounds like the variable width filters are always narrow or that you 
have some other filter problem.  The easiest way to understand what is 
happening is to use Spectrogram to observe the filter passband.  Go to 
my website www.w3fpr.com and you can find links to 2 freeware versions 
of Spectrogram near the bottom of the opening page.  If you are running 
Linux, it will run under WINE.  If you are running a MAC, you will have 
to find an alternate audio spectrum analyzer.

You could do a quick check on the variable filter without Spectrogram.  
Measure the voltage on D31, D31, D32, and D33 as you change from one CW 
filter to another.  If the voltage is always zero or does not change, 
then the control voltage to the filter is not working (zero voltage will 
mean that the filter width will always be very narrow).

One temporary work-around is to use the OP1 filter for wide CW 
reception.   Change the CW FL1 filter to OP1 and use the same BFO 
settings that you have set for SSB FL1.  CW is LSB and CW REV is USB.

73,
Don W3FPR

On 1/3/2015 6:40 AM, Behiels jean-Pierre wrote:
>
> Hi K2 members and users;
>
> Majory I like to receive some impressions and experiences from other 
> K2 users.
>
> I bought quit a year ago a K2 kit,witch operates fabulous no matter 
> about that.
>
> But after playing around a while in CW and SSB I like to talk about my 
> experiences around the receiving signals !
>
> I now,the K2 above all is a CW radio not a SSB radio ,some guys told 
> me before (I hope to is true,correct me if I am wrong hi )
>
> Every time I switch between CW and SSB mode I do have the idee I 
> receive a lot more on SSB
>
> I always receive the impression that the bandwidth on CW is to small 
> for confortable listening to CW signals ?
>
> When I switch to SSB and tune to the same received signal,it sounds 
> more comfortable on my ears
>
> Before giving remarks around,I must told and I can confirm that all my 
> settings have been done “exactly like described in the manual” .
> I have always the impression there is something wrong on CW mode and 
> specially around receiving CW signals.
>
>