[Elecraft] K2 Mods

Wed Sep 11 11:15:32 2002

Ron,

Thanks to Sverre, LA3ZA for compiling the list of mods to the K2, and to 
you for pointing it out.  It's something I had been looking for.  Now that 
the "Winter Sport"  season, i.e. ham radio construction is rapidly 
approaching, it's time to get started.

At 07:33 PM 9/10/2002 -0700, Ron D'Eau Claire wrote:
>Wayne has said on several occasions that he strongly recommends the 2nd
>Xfil Flattening Mod. I can tell you from personal experience that SSB
>sounded very poor on my K2 before it put it in. John, KI6WX has a small
>refinement to the mod in his documentation that makes the resulting
>filter response even flatter.
>
>A LOT of us had trouble with 'scratchy' sounding AF gain pots, and we
>ran the AF gain near zero at all times. The AF Gain mod fixes this by
>rewiring the gain pot to put it in a more conventional circuit than the
>original design used. The original circuit depends upon the pot shorting
>out the AF in order to turn the gain down, so at the low end it assumes
>the pot will be a dead short. They seldom are, and to the low end
>settings become touchy and the gain tends to jump around and control
>sounds 'scratchy'.
>
>If you are going to work PSK or other digital modes with the SSB module,
>then the mod in John, KI6WX's documentation to improve the ALC
>characteristic is highly recommended.
>
>Those are the one's I can recommend from personal experience. At least
>the ones I can remember. My Elecraft "manual" is not a thick manila
>envelope stuffed full of notes and loose scraps of paper. Somewhere in
>there are the remnants of the original manual...
>
>Sverre, LA3ZA, has a list of mods at
>http://www.qsl.net/la3za/K2/mod.html that includes a brief description
>of each mod and comments about what it accomplishes.
>
>Ron AC7AC
>K2 # 1289
>
>
>
>  talk about "approved K2 mods" and such has piqued my interest. What are
>the best (yes I know this is a loaded question) mods for the K2. I'm
>currently building one up and was wondering if I should build it to the
>current manual specifications and do some mods later or go ahead and add
>some of the mods now. If I do add any mods, which ones? Nothing too
>complex, like those sub-miniature caps in the CW filter mod. My
>operating is casual, mostly CW though some SSB will be had and the
>occasional contest.
>
>Cheers,
>Colin
>N�YGY
>
>PS - I know Elecraft has a link to a couple of sites that have a list of
>most of the available mods. I'm interested from a average operator,
>average builder standpoint.

73, Chas, W1CG
K2 #462

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