[Elecraft] Questions about new crystals

Sat Dec 14 16:21:00 2002

I have completed the BFOMDKT and the K2KSB2XTLS MODS to K2 #2260.  This =
has
got to be the BEST upgrade Elecraft offers.  If you have been thinking =
about
it, "Just do it," it is well worth the effort and can be completed in =
just
several hours.  The BFOMDKT has limited my frequency drift to less than =
20
Hz.  The K2KSB2XTLS has flattened, slightly widened, and reduced the
frequency change between the various XFIL settings.  The display in
Spectrogram is significantly flatter and now exceeds the specified 2.2 =
kHz
bandwidth. Like Eric/Wayne says it is suitable to all rigs before #3000,
doesn't cost that much, and you get to heat up the soldering iron again. =
 I
was surprised as to how much of the frequency error was actually the BFO
drift error.

After completing the above mods and then doing Steve GU3MBS frequency
calibration posted on 29 Nov 2002, my frequency + BFO drift error is =
less
than 20 Hz after several hours (and in between.) =20

Rich,
KE0X

-----Original Message-----
From: [email protected] =
[mailto:[email protected]]
On Behalf Of Parker Buckley
Sent: Saturday, December 14, 2002 2:28 PM
To: [email protected]
Subject: [Elecraft] Questions about new crystals

I have K2 #2636.  Now that I've ordered new crystals as part
of the upgrade package, please tell me once again why I'm
doing this?!  Are these better matched than what came with
the kit?  I've seen earlier comments along the lines of
these crystals correcting some low-gain situations, which I
don't really believe I have.  I did read reference to
improved second crystal filter flatness, so maybe that's my
answer.  Everything calibrates well with Spectrogram and my
audio gain is about 9 to 10 o'clock during normal use as is.

Also, I recall something about one crystal being totally
removed in one of the mods.....I've obviously lost the
bubble here.  I don't see reference to it in the Revision B
instruction booklet.

Back to the 10 meter contest......

Thanks,
Parker WD8JOL

_______________________________________________
Elecraft mailing list: [email protected]
You must be a list member to post to the list.=20
Postings must be plain text (no HTML or attachments).=20
See: http://mailman.qth.net/mailman/listinfo/elecraft
Elecraft Web Page: http://www.elecraft.com