[Elecraft] K2 CW filter alignment

[Sam Morgan]

Sam Morgan wrote:
> Morning all,
> I have a new (to me) K2 #2481 it has the KSB2 and KAF2 .
> When I check the software version it reads "2.01 H   1.02" first 
> question is:
> does that mean that I am running version 2.01 or 1.02 software?
> 
> I don't yet have the dead tree version of the manual(s), so I have been 
> spot reading the ones I found onlne.
> 
> I really didn't want to get into the in depth BFO alignment stuff yet 
> and am hopefully assuming it's on the correct side. My question arose 
> when I wanted to move the previous owners cw center frequency up from 
> 500hz to 600hz. Using the instructions I found on: 
> http://www.n0ss.net/k2_filters_using_gram_v5r17.pdf
> 
> Everything went well, the center frequency is now 600hz and the filters 
> look and sound nice and tight.
> Referencing page 8 of the above pdf I ran in to a problem, so it says. 
> The DAC in CW Normal does is not lower than the determined center 
> frequency value.
> 
> Then I read on page 9 and it says *if* the BFO is on the wrong side, 
> (which the DAC readings would seem to indicate), one or more filter 
> setting would show a shift of the center freq and be more than 200hz 

*correction that was meant to say 20 hz off*

> off. All the filter settings are dead on, no vfo changes needed when 
> cycling thru the 4 settings.
> 
> SO what's the deal here, do I ignore the DAC readings?
> Bandwidths used are 1400, 800, 400, 100.
> 
> Center freq DAO                              CW Normal DAO
> 142                                                   157
> 135                                                   154
> 130                                                   152
> 128                                                   151
> 
> Ah the joys of a rig you can actually work on, heheheh.
> TIA
> 

-- 
GB & 73's
KA5OAI
Sam Morgan