[Elecraft] K2 SN 192 ?

Don Wilhelm w3fpr at embarqmail.com
Sat May 17 14:29:47 EDT 2008


Puck,

If the price is right, you can end up with a K2 that is an exact equal 
of the current shipped K2s.
You did say it has the Rev B boards included, and that is the current 
ship level for the boards.
I know you will need to order the Keying Waveshape Mod and a couple 
1N4148 diodes over and above any kits associated directly with the A to 
B conversion.  You will also have to inventory just which mod kits have 
been included with the A to B upgrade - there is the basic K2ATOBKT, but 
there are several 'optional' kits too (I don't consider them really 
optional for a complete job).  Some of them may be included in the 
package he has, maybe not.

In addition, you would want to order and use the newer spec'ed IF 
crystals (these were introduced after SN 2560), and you will want to be 
careful with the pre-wound toroids for a few have changed (L25, L26, T7 
and T3 are the specific ones I recall).  You may or may not have to 
order the newest firmware (I don't know which level he would have).

All in all, it should be an easy task with the new set of boards - the 
AF Gain wiring changes are already on the new rev boards.

It would actually be best if you built to the current manual 
instructions rather than either manual that might be included.

Price-wise, the entire set of A to B mod kits (exclusive of the boards) 
total to less than $150 including the new firmware.  With that as a 
consideration, you can intelligently negotiate the price.  After you 
have the kit(s) in hand, we can help you sort out which of the mod kits 
are present and which need to be ordered.  The task of getting 
everything straight may be a bit confusing at first, but once that 
accomplished, the build should be straightforward using the current manual.

Note that with the purchase of the Rev B. boards, there should have been 
a new serial number too, and that serial number will be greater than 3000.

73,
Don W3FPR

H. M. Motley Jr. wrote:
> I have a chance to buy a rather early K2 in unbuilt kit form. It's serial number 192. It has the SSB adaptor, Noise blanker, Audio filter, a set of pre-wound toroids and the Revision B boards and parts and updated manual.  In doing some research on the WWW, I see there have been a number of changes/modifications over the years by the factory and others. I've run across alternate wiring for the AF gain and mention of a cure for BFO drift.  Does someone have a list of the various changes that I should incorporate while building this rather early K2 should I decide to take the plunge and buy it? 
>
> Thanks & 73,
> Puck
>   
>


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