[Elecraft] Filter Crystals

Mon Dec 16 23:39:26 2002

John:
  I note that the "K2 from Revision A to B=A0Upgrade" manual does not =
include=20
the actual instructions for the 2nd Xtal Filter Mod, but simply indicates=20
to follow the instructions with the XFILMDKT kit.  For those who don't need =

the parts, but would like the new instructions, do you know where they are=20
available for download?

thanks,

dave belsley, w1euy

--On Monday, December 16, 2002 8:05 PM -0800 "John, KI6WX"=20
<[email protected]> wrote:

> The 2nd Xtal Filter Mod
> <http://www.elecraft.com/Apps/new_fil_docs/k2_2nd_xfil_ssb_mod.pdf> is
> necessary if you want a flat response on SSB.  The new Xtals do not fix
> that problem.  An improved version of the 2nd Xtal Filter Mod is included
> in the Rev B update.
> -John
>  KI6WX
>>
>> BUT, this weekend, I did the BFO mod, and the 14 filter crystals.  What
>> an enormous difference. The filter is as flat as a table on top, and =
with
> just
>> a slight adjustment of L34, is identical for LSB and USB.
>>
>> Unless you can confirm that your K2 was shipped with a matched set of =
14,
> I
>> would highly recommend the mod.  I also bought the parts kit for older
>> 2nd filter mod (the one that switches in and out on rcv to xmt).
>> Completely unnecessary with the new crystal set.
>>
>
>
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----------------------------------
David A. Belsley
Professor of Economics