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From: "Dick" <knaap159@zonnet.nl>
To: <rsgb_lf_group@blacksheep.org>
Date: Sat, 19 Aug 2006 21:16:13 +0200
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Subject: LF: TIP: modifiying X-tals
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For those who didn't know, use following 'trick' to tune your own X-tal. =
 (found it in a magazine from the VERON)

Remove the metalcover and place the remains in an oscillator.
Now it will oscillate on it's original frequency.

Take an permant marker pen ("Edding, or similar) and put a little =
stripe/line on the X-tal plate.
You will notice that the frequency goes down a bit.
Wait a little until the xyleen/alcohol or other stuff that's in the =
paint has gone.....
By adding more of the ink on the cristal, it will go lower in frequency.
However there is a limit, and there will be a point where the X-tal will =
not start anymore.

When there is to much ink/paint on the X-tal, you can remove it with =
alcohol or something.

In this way I managed to tune a 4433,619kHz X-tal down to 4406,4kHz, =
which, divided by 16 give 275,4, which drives my rig.
275,4 divided by 2 is 137,7kHz!

I think for this X-tal this is about the limit, maybe 40kHz down, but =
that's probably it.

But it works!

A really nice thrick to get those odd X-tal frequencies!

Dick, PA4VHF
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charset=3Diso-8859-1">
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<STYLE></STYLE>
</HEAD>
<BODY bgColor=3D#ffffff>
<DIV><FONT face=3DArial size=3D2>For those who didn't know, use =
following 'trick' to=20
tune your own X-tal.&nbsp; (found it in a magazine from the =
VERON)</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>Remove the metalcover and place the =
remains in an=20
oscillator.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Now it will oscillate on it's original=20
frequency.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>Take an permant marker pen ("Edding, or =
similar)=20
and put a little stripe/line on the X-tal plate.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>You will notice that the frequency goes =
down a=20
bit.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Wait a little until the xyleen/alcohol =
or other=20
stuff that's in the paint has gone.....</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>By adding more of the ink on the =
cristal, it will=20
go lower in frequency.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>However there is a limit, and there =
will be a point=20
where the X-tal will not start anymore.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>When there is to much ink/paint on the =
X-tal, you=20
can remove it with alcohol or something.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>In this way I managed to tune a =
4433,619kHz X-tal=20
down to 4406,4kHz, which, divided by 16 give 275,4, which drives my=20
rig.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>275,4 divided by 2 is =
137,7kHz!</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>I think for this X-tal this is about =
the limit,=20
maybe 40kHz down, but that's probably it.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>But it works!</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>A really nice thrick to get those odd =
X-tal=20
frequencies!</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>Dick, PA4VHF</FONT></DIV></BODY></HTML>

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