[Elecraft] Matched Filter Crystals

[Paul Jensen]

> This may be na=EFve, but.....  on the Elecraft site at 'K2 PARTS AND MOD
> KITS' I saw "K2KSB2XTLS Matched Filter Crystals (14) For existing K2 and
> KSB2 combinations". I have a long stalled K2 kit that I am 'building',

These new crystals replace the 7 in the cw filter and 7 in the ssb option
board (KSB2).  It makes a huge difference!  The crystals are better
matched than the previous crystals.  I do not see the big drop in signal
strength when switching to a narrower bandwidth.  The passband ripple is
also less, thus improving the audio quality.  There is no difference
between USB and LSB sound now.

This is a major upgrade and would recommend everyone do it.  For the $15
cost and 30 minutes of work (with a hakko 808 desoldering tool), this is a
no-brainer.  I also removed c180 (as part of the 2cd Xtal mod).

Paul Jensen
AD5IW