[Elecraft] New to me K2 question. Filter performance

[Don Wilhelm]

John,

Yes, realigning the filters should help a lot - and you can set them to your
preference for filter width and preferred pitch rather than just using what
someone else has chosen.

If you need information about how to do a complete job, look at the K2 Dial
Calibration article on my website www.qsl.net/w3fpr.  Concentrate on Step 3
which is the filter alignment portion.

73,
Don W3FPR

----- Original Message -----
>
> I recently traded for a K2...SN in the mid 2000s but it's been upgraded
> to latest rev. It did not work well at all, and due to a chaotic work
schedule
> I chose to send it to one of the alignment/rework experts listed on the
> Elecraft
> page, who did  a great job finding 2 bad components and many many bad
> soldering joints, it's now been brought to life.
>
> My question revolves around the filter performance. My rig has the
aftermarket
> filter option. Here's the scenario:
>
> Mode: CW
> Band: any (have tried 40 and 20)
> XIT off
> RIT off
>
> I tune a CW signal in, with the filter selection to FIL1 (which is OPT1),
> and adjust main tuning to comfortable pitch.
>
> If I then select FIL2, 3 or 4, the signal disappears from the passband
> and is found some distance away.  Toggling between 2,3 and 4 makes
> no difference in the pitch or the position of the signal in the
increasingly
> narrow passbands...in my rig 700 400 and 200 hz.
>
> Here's some data.
>
> Signal tuned w/OPT1 filter      14.04403 Mhz
> Same signal w/Fil1-3 filters      14.04272 Mhz
>
> on 40m
>
> Signal tune with OPT1 filter       7.0432 Mhz
> Same sig tuned w/Fil1-3 filters   7.0421 Mhz.
>
> My question is, will the filter alignment process resolve this issue?
> I cannot make any contacts with the rig in the Fil 1-3 position, as
> the received signal is outside the audio bandpass with those filters.
> An hour of working the NAQSOP yesterday proved that. Chose the
> wide OPT1 filter, and immediately worked everyone I heard.
>
> Should I delve into the filter alignment process? I"m confident in doing
so,
> i just want to make sure I get the "golden screwdriver" applied to
> the correct fix!  :-)
>