[Elecraft] K1 Noise Blanker version diffs?

[Don Wilhelm]

James,

The KNB1 electrical design has not changed between board revisions C and D -
only the board silkscreening and perhaps a few minor PC traces would have
changed.  The board changes have addressed the C6, C8 situation - otherwise
they should be electrically the same (compare the schematics).

Yes, Elecraft is on a budget (are not we all?), and for minor changes like
this, the old board stock would be used up.  If there were a major change or
the previous board trace patterns incorrect, the older run would be scrapped
and the new board sent with each new kit.

If you are unhappy with the board you have in hand, you may want to contact
the folks at Elecraft to see if there is some kind of action available that
would satisfy you.

73,
Don W3FPR

> -----Original Message-----
>
> I am the proud builder/owner/operator of K1/4 #2319. Had it fired
> up and on the air this past weekend.  Great little rig.  I was
> building the K1NB board tonight, and noticed the manual has
> directions for Rev C and Rev D.  The instructions for Rev C
> include installing a cap in a mis-named location (there are 2
> C6's on the board), omitting a C8, and other differences vs. Rev
> D.  My questions are these:
>
> 1. Since my K1 and accessories (including K1NB) are a recent
> purchase, should I not have received the "latest" rev, which
> appears to be D?
>
> 2. In my experience, later revisions are based on experiences
> with earlier versions, and are thus improved. Is Rev D a better
> design / performer than Rev C?
>
> 3. If there is a Rev D, why do they even ship Rev C versions?  To
> get rid of old stock?
>
> For a recent purchase, it just seems a little odd to be building
> an older version of the board than the latest available.  Kind of
> like buying an older version of a software program when a newer
> is already released.
>
> Any insight or answers to the above questions?
>
> Thanks and 73,
>
> James
> N4JX
>
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