[Elecraft] Updates to ole #337

Randy Moore Randy Moore <[email protected]>
Fri Dec 6 09:06:01 2002


Finally got around to applying some long delayed updates to my 3 year old K2
(#337).  Late last night I completed the 2nd xtal filter mod, the PSK31 mod,
BFO torroid, ref. xtal osc, and replaced all my old filter xtals with a
matched set.  No, I didn't do all that at once - I did some basic testing
between each one, just to make sure nothing bad had happened, but I wanted
to wait until it was all done to tweak things up.  It was late when I got it
all done, so I only ran through a quick CAL PLL and CAL FIL on only CW.
Initial observation is - WOW!!  I've always had serious attenuation of
received signal on CW with progressively narrower filter settings.  I had
long discussions on the reflector 3 years ago about it.  The concensus then
was that something was wrong, but no one could tell me what it was.  Well,
all that's now GONE!  Very little attenuation now!  An amazing difference!
I must have gotten a worst case set of filters xtals!

I captured some "before" Spectrogram images before starting this, and this
weekend I'll do some "after" shots and make them available somewhere.

I am not fond of doing these mods, and there's always a risk of me screwing
things up, so I agonized over it for a long time, but it looks like it was
well worthwhile!

73,
Randy, KS4L