Jon,
I don't think the serial number information for older K2s is still
available from Elecraft.
As for the upgrades, I suggest you download the instructions for the K2
A to B upgrade. That is only the basic upgrade. The 1st page of the
instructions lists several other upgrade kits. Download the
instructions for each of them to determine which (if any) have been
installed on your K2. Installing all of them will give you a K2 that is
almost equal to a new K2.
In addition, changing the IF crystals to the current crystals will
improve the filters on your K2. If you have the KSB2 board, change
those crystals as well - Elecraft sells a set of 14 matched crystals for
the K2 and KSB2 as well as a set of 7 for the base K2 only.
While you have the crystals off the KSB2 board, it is easy to change the
filter capacitors to extend the filter bandpass from the original 2.1kHs
to the new 2.4kHz - the capacitor kit is SSBCAPKT.
As far as firmware, upgrade the MCU and KIO ICs to the new version. The
only other firmware upgrade that is needed may be the KSB2 which should
be upgraded if you ever add the KPA100.
The KAT2 wiring change was only valid for a short run of boards when the
vendor printed the boards upside-down.
Download the KSB2 PSK mod instructions to see if you have the updated
resistor and capacitor changes - if not, change them.
If all that is done, your K2 will perform like a new one.
73,
Don W3FPR
On 4/12/2018 2:28 AM, Jon wrote:
Hello all!
Long time no mailing list... I have a nice, vintage K2, that I want
to spruce up, tune up, and bring back to it's full MOJO. Kind of a
it's not dead yet, it's just resting. Actually, it's been in use, off
and on over the years, am now getting more serious about plying the
airwaves.
Been looking over the various places of K2 lore, for updates and so
forth, Sverre's site, Don's, and of course the Elecraft site.
First order of business , is it possible to have my S/N looked up?
Found a database that I don't seem to be in, found that the Elecraft
list archives go back to 2001, but I'm not finding a post of mine in
there, so hopefully the Elecraft Records Repository would still contain
it somewhere. Then I can proudly post it on the bottom of my mails, like
it was done back in the day. ;-)
Next, I have a range of boards for it, the NB, SSB, Antenna tuner, 160m
antenna, and just built my long languishing KIO2 kit, to bring this
K2-10 into the 21 (20th?) century. I have started to go thru them and
see if I have all the mods and etc that should be done on them, have
done many already, but back about '03-04. Guess this is just a matter
of looking things up, though I have a few questions there and probably
will have more.
Another next, I've been having difficulty checking to see which
versions of firmware are the latest, and what the various versions
add. Is there a version change log or something like that?
Here's what I have so far, looks like the two main ones are down a
bit, but I don't know what I'm missing, or if I really need the updates.
MCU 2.01f
RF 1.02
KSB2 1.04
ATU 1.03 f
Here's the PCB versions marked on the boards:
Main rev A
Control rev A
ATU rev C (note, the board does NOT match the picture of the recent
note stating some cut and jumper rework should be done on a rev C)
NB and 160m rev D
SSB don't have, will have to yank it to read
So, the beginning of a journey. Will greatly appreciate whatever tips
and directions I could be pointed in.
Jon - KA6MOK K2 #????
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