[Elecraft] Got K2, many questions...

[Don Wilhelm]

Steve,

As others have replied, your filters should be re-aligned (particularly 
the narrow ones) if you shift the pitch by 200 Hz.  A 50 Hz shift can 
easily be accomplished without re-adjusting the filters, but the 
response will fall off the edge of the more narrow filters if you go 
further than that.
If you have the KDSP2 installed, you must also change the filter centers 
on the DSP CW filters too or you will hear nothing.

Look for the counter probe or order a replacement kit from Elecraft, 
download Specrtogram 5.17 (the last freeware version) from www.n0ss.net 
and look at my website http://w3fpr.qrpradio.com - article 'Setting the 
K2 Dial Calibration' for information about how to set the filters (the 
filter setting is in 'Part 3' of the article.

2) When the KAT2 (or the KPA100) is installed, the BNC connector on the 
lower rear panel of the K2 is no longer to be used - connecting an 
antenna to that BNC will cause HI CUR warnings because the K2 cannot 
sense the power output and will ramp the power up to maximum.

3) While swapping the top cover for the KPA100 is not a difficult chore, 
if you plan the KPA100 and the KAT100, I would opt for putting them both 
in an external EC2 enclosure.  The KAT100-2 has all the 'hooks' for 
plugging the KPA100 into it's board making the QRP K2 available for 
portable operations by just removing 2 cables.  The coax to the 
KPA100/KAT100 combo connects to the KAT2 ANT1 connector and the KAT2 is 
automatically bypassed.

I too would suggest that you replace the Matchbox with an Elecraft BL1 
or BL2 balun.  The K2 will remember the tunings for each band and you 
can change bands without any manual tuner 'knob twisting'.

73,
Don W3FPR

Steve Kallal wrote:
> I just a got second hand K2 today and have some questions. For reference the
> SN is 2289 and it has the 2004 mods.
>